PMDD and birth control?

I'm 17 years old and I'm almost positive I have PMDD. I've always been a little more depressing of a person compared to other people. I get depressed and show signs of being suicidal a few days before my period. I also get pretty irritable and have a hard time falling asleep along with binge eating when I'm not even hungry. A few periods ago I cried for 3 days straight (not crying 24/7 of course but you know what I mean). My mom ended up giving me an antidepressant that she got prescribed to take before and during her periods and that helped me. I'm not sure whether I should bring this up to her to get help and be put on birth control or just wait until I turn 18 in 10 months so I won't need parental permission. I have brought up getting put on birth control once and she said she'd make an appointment but I feel like she was just saying that because it never happened. That's why I'm considering waiting until I turn 18. Any advice?