2 years ago when I was traveling in Thailand I was drugged and raped. I went out with some friends and the next thing I remember is waking up to a man I had never seen before having sex with me. As so as I started to realise what was happening I started to scream and try and get away from him but he just hit me and carried on pushing me down on the bed. Then when I finally thought it had stopped he got off of me and started to perform oral sex on me, which was somehow worse as it seemed more intimate. He then got back on top of me and continued to rape me. The ordeal lasted around 3 hours. Until now I have managed to do a good job of blocking out the memories but recently I keep having so many flashbacks. How can I try and block the memories out again?