I'm having death dreams?

Alright here goes. Last week I had a dream that my best friend Sammy, killed himself. Then after I found out I went and killed myself. I had another death dream today, were my one friend Danielle died. I never had death dreams before. Here's a little (well a lot) about me. My mom went into the hospital on New Years Eve, she had a heart attack then 2 strokes. She was in surgery then died on the table for an hour. The doctors revived her, they said its a mirical because they normally stop working on someone after 20 minutes. Anyway shes been in the hospital ever since then, she can never go home because she has brain damage, and isn't able to be home alone. At the time of this I was only 17, Its just mom and me. So its really hard. I tired killing myself February, I od. Then I tried to hang myself in the school bathroom in April. Never the less both times I went to the mental hospital (Laurelwood Hospital, in Ohio) My best friend (Sammy) is also suicidal. So I don't know maybe that's why I had the dream or what? But its just been freaking me out. Like I said I never had a death dream before. I looked up online about Death Dreams, and it says that it normally means that someone is going to have a baby or get married, well I'm engaged to my fiance. I don't know. Someone please help me? Any ideas on why I'm having these dreams?