Drama,, and really bad thoughts what do i do to get over it?

I recently just asked a question about the drama going on but now its time to ask this question,, so i have friends tons of them but a few close ones and there is these 4 girls that are getting more people together and gaining up on me bc im friends with other people that they dont like and they are saying stuff to me to hurt me and making fun of me and im not the type of girl to just let all this go i am going through a rough time of losing 2 people from cancer and lung failure. They have made me cry myself to sleep for a while im upset my true best ones know im diff but i wont talk. yesterday it go WAY worse where it went onto facebook all over my wall and this adult told me to go die in hell bc no one care or will miss you so that is stuck in my head and i was recently in the hospital because i have really bad health problems right now and i have to take tons of pills and yesterday i was about to take the whole bottle of all of the ones i have but a close friend called and heard i was bawling so she ran over to talk to me and i had note to my friends and family written out on my bed and i stayed at her house because she was scared for me and now tonight im alone and afraid if it gets worse i will! what do i do?? sorry if you dont really understand it im bawling writting this and dont know how to say it! and i am a 16 year old girl! will someone please help me?