HELP!!

Every month for more than a week before my period, I get really suicidal. Is this pmdd?

The last few days, I've been catching myself writing my suicide note in my head. I'm not gonna do anything. I keep telling myself it'll pass and I know it will, but it feels like it won't. Does anyone else experience this and have any advice for handling it?

Edit: I know I should go to a doctor. I just want the right words to explain what's happening when I do.