Cramping

Okay so I have been TTC. My fiancé and I are trying for a baby. I have PCOS and I'm taking metformin and I have been on it since January. My cycles are about 42 days long. My last period was April 26. The first week of June I had bad nausea, extreme fatigue and throwing up. I took a test and it was negative. My period came on June 8th and it last only 2 and a half days. It was kinda pink then it turned red but it was a weird short period and I had no cramps. So now I'm thinking was that even my period? Since Sunday I have been having bad cramping and headaches. My calendar says that I'm not suppose to ovulate again till July 6th. And I actually have a doctors appointment tomorrow. pregnancy??? Any advice??