I’ve been struggling with nightmares for years and from a young age, I keep having weird sort of flashbacks or dreams of the same thing happening, it’s been like this for years, I dream of myself being sexually assaulted by my older cousin, it feels very real and like an event that happened but also not something I can remember happening and it’s always affected my sleep. 
Most nights I repeat the same dream and always wake up sweating and shaking, I’ve talked with a therapist and she says that it could ptsd or I could just be stuck in a cycle of that one dream, I don’t really know what to do as now I’m in university and I need to get more sleep and I just can’t, I’ve tried sleeping medication but it doesn’t really help a lot, any advice as to how I can overcome this anxiety would be very appreciated.