Hey I was on Seroquel for a little while and it just made me feel really groggy and lazy, it didn't put me to sleep. I told my doctor and now I take Trazadone and Gabapentin which work very well for sleep and I also have Zolpidem for nights when my insomnia is really strong and it breaks through the other two. Medication affects us all differently but it sounds like you need to tell your doctor that the Seroquel isn't working and seek an alternative, good luck to you, insomnia is one of the worst symptoms in my opinion and sometimes nightmares don't occur when you are sleeping, they happen the day after you can't sleep.