Double pickiness

These two.....I don't know what started it, but both are extremely picky lately. I'll start with Zoey because her drama will be shorter. For a few weeks, she has been abondoning her food. She use to inhail it as soon as it was put in the bowl. Actually, she would push us out of the way while we were pouring it in, and food would go in her water, or on the floor. Now, she stares at us like seriously? You expect me to eat that? And it will sit there for half a day before I finally worry too much and sit near her while she eats it. Forget her eating from the kitchen. She's too good for that now apparently. She is acting normal, so I guess it's an old dog thing. I have a call in to the vet (who's on vacation) so hopefully some answers soon.
And on to the boy drama.
He's also extremely picky. He use to eat like a grown man. Now, especially in the past week or 2, he is EXTREMELY picky. Major sensory issues going on. Stuff is too crunchy. Sticks to his tongue wrong. Looks weird. Anything you can think of, it's wrong. He will take a bite or 2, then gag and have to spit it out. And at that point, he's done. Nothing more can convince him to eat. The weekend took a major turn and he had a really big panic attack about popcorn. In the middle of the movie theater lobby, he freaked because a piece of popcorn touched his tongue weird and was stuck. He was convinced it was choking him and he was going to barf and he just lost it. Again this morning, with pancakes. They were "crunchy" and he had to spit it out because he was going to barf. We explained how important it is for him to eat, so he doesn't end up passing out and going to the hospital. We even tried to scare him about the fact if he did not eat, and went to the hospital, that he'd need an IV. He knows what that means, and this morning he got his shoes on and asked which one we would have to go to, because he had no intention on eating breakfast. So, after a talk, he went to school without eating. I made some calls, and the school therapist pulled him out and talked to him for a while. I called another therapist and they are working at getting him an appt for an evaluation. He has an appt with the regular doctor on Friday to rule out any concerns, and a dentist appt next week. Covering all the bases. According to the talk at school, he has major anxiety about eating. Part of it is from when his teeth are loose, he says it hurts him to eat. He has only told me this once, and it was with the most recent tooth he lost last week. And he was super excited about that tooth. She said he told her he is worried about how many more he needs to lose, because they hurt when they get wiggily. He was in tears. He also is very worried about something like the popcorn happening again. More tears. She feels there is an underlying problem, and there has been some mention of high fuctioning autism, and a few other possible reasons. It's more than just a phase in their mind.
Tonight I talked to him more, and explained how important it is for him to eat. And how many people are worried about him when he acts this way. He said that he just feels really full, and sometimes his belly hurts. I explained that when he skips eating, that he can cause more pain because he's not eating when he should be. He's also lost 2lbs.
So we let him pick supper, and sides. He chose a burger, and I cut it in half. The deal was if he could eat one half, he could play computer games. He forced it down, getting a drink every couple bites. Then, he got his reward. After I said time was over, he willingly quit, and went back to the kitchen and finished the entire plate of food. Then tells us that apparently he is all better now. I asked what was wrong, since he had told me he was feeling fine all along. "I guess I just didn't eat enough." And that was the end. No more complaints or weird behavior. Just over like that. I hope that's truly the end, but I worry too that there is something more wrong.
What I do not understand is how it just developes from nowhere. He's always met all milestones without any concern, and usually early. He's crazy smart. He's always been fine with eating, and eating anything offered. And we usually have to make him stop. He is extremely emotional though, and very deep thinker. He thrives on routine, and a change in that will cause drama. He still is behind on fine motor skills. Apparently these flaws, have them thinking there is a bigger picture. I'm scared, and completely confused. It will be a week or 2 till we meet with the therapist, so I really hope it goes by fast. I haven't slept very good, and I feel like crap from all the worry. I have to stop reading and researching till I know what I'm looking for.
I also feel really hurt that he can open up like that to the therapist at school, but always tells me nothing is wrong, "i'm fine", etc. Even tonight, he was quiet until I said that I talked to her after him.
So, I guess it's always something here. I hope that I can get answers fast, and get him whatever help he needs to over come this. And the dog too.