Should I get a second opinion?

I went to the doctor and asked to be put back on antidepressants. She talked me out of it but now I am regretting that I didn't insist I needed them. I am suicidal, and I told her about it but I don't think she took me seriously. Last night I cut myself and tried to strangle myself with a curtain on a door knob. Obviously didn't work... I am so tired of feeling like this. I know I am over dramatic but I can't help it. I was abused as a child and can't seem to get over it.