11 yr old non-verbal son

My son has been doing fairly well the past 2 yrs on Stramonium, he always had severe nightterrrors was diagnosed autistic, had many angry outbursts, about 2 months ago, he started sleeping in our bed again being very afraid to fall asleep at night, urinating during the night,his fear of water (should I say deep water, no more than an inch in the tub) returned although he obsessed with playing in water. he's sensitive to high pitched noises, has gained a huge amount of weight in short periods of time, he eats well, lots of vegetables, no junk, craves carbohydrates, drinks only water. He's 5'2" and weighs 200 lbs, very robust,strong but flabby , alot of breast tissue and large abdomen. He bites his hand and wrist when angry and will spit at you or throw objects at you, he is also very loving and kissing you alot and hugs, can be very sweet,smiley and happy, his mood seems to change very fast, in the past stramonium always works but it never seems to last long,lately I have to give it to him about 1 -2 times a week. Can you help me, he seems close to Belladonna also. Sherry