Have alot going on here

Hi I am Jessie and my son is 2, will be 3 in Feb. He was diagnosed in April with Autism and senory integration dysfunction. has severe food avoidence no fruits, corn is the only veggie he will eat, very tactile, gags if any food is offered to him I have to put food on the table and let him approach it. He is on so many meds Abilfy, Trazadone, Melatonin, Miralax, Tenex, and rantidine. I just went for a consult with a DAN! dr in our area and was told to start some things like digestive enzyme, probiotic, epsom salt cream and baths, vitamin C, GFCF diet, I am very overwhelmed last night was a horrible night my son even with all the meds he takes before bed still does not sleep well he slept 4 hours last night very aggressive with me, he is self injurous as well when he is upset he flails back and hits his head as hard as he can on the floor. I just wanna help my son he is very delayed on speech he is at 10 months old, good on cognitive skills, receptive communication is excellent but expressive is where the problem is we are suspicious of Apraxia and Auditory Processing with him as well I just had a really rough night with him and have not started anything up yet still trying to find the things I need that the DAN! dr wants me to start. I just needed to vent this is not usually how I am I am a go getter when it comes to my son I just feel like my tank is empty hopefully today will be a better day thank you for listening I want you all to know I am not a whiny person just needed to vent any advice would be welcomed thank you