I would switch doctors first of all. Any doctor who tells you your child needs nasal spray should at least tell you what kind is safe for him. As for waking up at night crying and screaming uncontrollably, it could be night terrors. They are just bad dreams in where your child appears to be awake and crying or screaming but really has no clue what is going on around him. The best approach to this if it is night terrors is, believe it or not, let the child wake up on his own. Comforting him might cause him to scream louder or lash out because he is unaware of his surroundings. As for sweating, both my kids sweat profusely at night. Some kids just do. My son had adenoid problems before they were removed along with his tonsils. Children who suffer from adenoid problems often have frequent sinus infections, may have sleep apnea, which is where you stop breathing for in between 10-30 seconds, snore loudly, have frequent ear infections, and often have large tonsils along with the adenoids. I don't know what the symptoms for your child are that made you think it was an adenoid problem so I can't help you there. A lot of children have trouble falling asleep. Have you established a bedtime routine, brush teeth, take a bath, read a bedtime story, glass of water, lights out? Is the television on? Anything that might distract him? And last of all how old is your son? Hopefully I can help you figure some of this out. As for constant colds, children are notorious for picking up every virus out there lol. But then again, he could have allergies and depending on his age, I am sure your doctor can prescribe something for him. Get a skin test done for allergies and monitor his food intake, see if something he is eating or exposed to makes him all stuffed up. I hope I was able to help.