I have never been diagnosed with pcos, but it runs in my family. I have always had irregular periods, and sometimes it could be normal for a couple of months. My last period was December 21 of 2016. My partner and I had unprotected intercourse on the 28th of December. I have yet to get a period, but I had a brown like discharge about 3 weeks ago. I ve been having headaches, lower back pain, and have been extremely emotional. Although I ve taken two at home pregnancy test in January, is there any possibility that I could be pregnant? Also I ve had burning sensation in my belly.