When ever i go heavy(4-6 reps) for about two or three weeks i wake up in the morning with a stuffed up nose, sore throat, and fatigue. This is even while only training 3-4 times a week. During the day i have no symptoms of a cold, just when i wake up. I dont think im overtraining because my lifts go up. Whats up with that? Is it because im hitting the CNS hard? If I lift in the 8-12 range it doesnt happen. Lifting heavy is awesome and im not gonna stop but does that happen to anyone else?