Help?!?

Sally
I have pcos and I am on Metformin. The Metformin has helped regulate my periods and has been great for me. I am currently 28 days late. I came down really sick and was hospitalized for a week in May. June 7th I I started protesterone to jump start my period. June 16th I finished the medicine. June 19th I started having light pink spotting so I figured it was my period which I thought was weird because I have never ever spotted before. Well day 3 and it's a brownish pinkish color with a couple of small red dots occasionally but the spotting is very few times within the last 3 days. We did have sex the 12th and the 14th. I have been cramping for the last week tho. I am just confused is this possibly me being pregnant and my body acting so weird or is this the start of my period and the period just being unusual. Btw my cycle is 31 days. Help would be greatly appreciated. I did get 2 blood test done may 17th and June 2nd both were negative. But when we had sex the 12 and the 14th I don't know if I was ovulating or not. I'm so confused.