Scared out of my mind!

My ovulation week was Sept. 29- Oct. 6 and during that time my husband and I had sex three times, once being in peak day. Since my ovulation has finished I have had spotting everyday, nausea, headaches, emotional mood swings, cramping and today I woke up with stomach pains. My body does feel different however my fertility doctor said I have three cysts and labeled me pcos. He even prescribed me metformin, which I have been taking daily. I don't want to assume in my mind I'm pregnant but I do wonder what if?! My period is due this coming Thursday, Oct. 19...so I'm assuming I have to wait. I just have never had my body feel like this. I don't want to be overreacting and maybe it's just pcos symptoms and not pregnancy. Any thoughts? I'm driving myself crazy and while I told my husband he doesn't seem to understand the frustration. I told my mom (who is a nurse) and she said it could be a cyst that burst....which made me think the worst. Any advice would be greatly appreciated. We have been TTC for 5 months now and this is the first month where my body is acting very different. Any thoughts ?