i was never dianogsed with ptsd but i was abused in my childhood. i had nightmares in my early to mid twenties about the house i lived in as a child.
i thought that everytime i have a dream about that house it means i was going to go through something. i called that house the house of horror.
weird enough my little sister would always have a nightmares about that house also.
i did get flash backs, and strong memories in my twenties also. when i got older they just faded away.
if your not seeing a therapist i advice you to see one. but i never did and i got over it fine.
are you able to drink herbal tea to help you relax at night or sleeping pills for a while.