My LO is 11 months. He had been sleeping real good but the last 2 weeks he has been waking up 2-3 hrs after we put him down at night! He wakes up screaming! I rock him back to sleep but it takes about an hr to get him back to sleep. Each time I lay him down he pops back up! This is so frustrating and tiresome! I need suggestions as to what could be causing this and any solutions! A couple of things; he just finished a round of antibiotics for an ear infection (the waking started after he finished it) He has had a runny and stuffy nose for quite some time, seems to get worse at night. I run a Vicks humidifier in his room. Please help.