Am i crazy after all this?

well let me start from the start,im 16 and over the summer i had two of my best friends die:( one got in a car wreak and when i got there they had not covered her body yet and i saw "well i don't want to go into detail" and i have been having nightmares ever since and i wake up screaming and crying and i have waken up in the corner of my room with her picture in my hand, and two weeks after that happened my friend Sarah called me crying and asked me to come over so i did and when i got in there i walked in and i fallowed the water on the floor and i got to the bathroom and i walked in there she had stripped and got in the tub with it running and she slit her wrists and the water was bloody of course and i grabbed her and pulled her out and tried to put pressure on the cuts and i called 911 and i knew she was dead before the ambulance got there put i didn't want to admit it i tied my belt around her wrists and gave her CPR and when the ambulance got there they pulled me off and didn't do anything they just looked at each other and shook there heads i was traumatized it's been months and i cant sleep i have got pills that should help me but they don't i have been hospitalized and i think im going crazy, am i? and could i have done anything more to save Sarah?