He hits his self!

Sorry for the long post but I'm so mentally exhausted and need mom advice. My son is 15 months and he has had a rough start to life. Hospitalizations, and he projectiled vomiting 6-10 times daily for the first 11 months of his life. After doctors appt after doc appts, fighting with the state for formula coverage due to prescription, finally, he was tested for food allergies, and was positive for corn. We finally thought that our little guy would get back to normal, but then another problem started! He began to get so angry that he would beat his head against the floor and hit him self. Then.. It happened... He past out and turned blue. Doctors say it's normal and he will get better. Nope.. It got worse. Now, at 15 months, he is doing it up to 10 times daily. He gets so mad, and I can't comfort him. He just passes out and the has a seizing moment. Doctors say don't worry, he will out grow it. When I research, it says he has cyanotic episodes but that they should only be happening once e\o week. We are about 60 a week. Please, if you have any advice, share. I don't want to overreact, but he seems so angry and I feel so helpless. I don't eat to pouty him through unnecessary tests, but I can't do this much longer. I feel like I have not been able to enjoy my sweet guy since he had been born 😢

Thank you so much!