In or around 2009, I was diagnosed with PMDD, or Premenstrual Dysphoric Disorder. At the time, I had never heard about it, and actually, I did not think it was a big deal. I think I actually looked at my ob/gyn like, are you kidding? But, she put me on an SSRI, which is the first line of defense against PMDD. The SSRI worked for me for years, until I became pregnant the first time.