PMDD is terrible

Does anyone else suffer from PMDD? I do and it sucks. I can't stop the tears. The mood swings are horrible because I'll be enjoying myself one minute and trying to fight back tears the next. It's been really bad the past few months. I'm 31 years old, if that means anything. If any of you also suffer or have in the past, what do you do? What do you think helps best? I appreciated any advice. Thank you in advance.