PMDD?

Hi!
I'm concerned that I have PMDD. For the past 4-ish months I always get irritable, mean, horrible to be around, angry, depressed, anxious, and many more things TWO WEEKS before my period. I also get horrible cramps a couple of days/the day before my period. I went from never getting cramps to having to buy menstruation pills for the pain. Am I suffering from PMDD? It would explain so much. Thank you!