Enuresis in 8y old boy

Our 8y old boy is still wetting the bad, sometimes even twice a night.We tried limiting liquid intake before bed, waking him up in the middle of night, tried Desmopressin, Opium and Causticum combined, then Staphisagria..nothing works.He is big, strong, healthy appetite, prefers meat, dairy products, pasta, does not tolerate acidic foods.He has dark hair, brown eyes, fair skin but tans easily. His left eye is a litlle bit lower than the right one.Has a 'dermatitis' red circle with flakey skin on left hand and leg, cold sores couple times.Had a history of repetitive anginas(5) and scarlat fevers(7) from 5y-7y, antiobiotics didnt work, sympoms were every time weaker.He is very sensitive, has a strong feeling for right thing, does not support unfairness, also scared and acting strange in 1th time situations(going to doctors, first day in school). He sleepes 10 hours a night, doesnt not wake up even when hes wet and snores.Sweats easily.Any advice, please,because he would really like to go on school trip for few days.Thank you.