So confused...Am I pregnant? PCOS?

Brooklyn
So I've been TTC for 8 months now. Lately I've been getting real emotional as if I'm on my period. I feel all out of whack. I've been breaking out which only happens when AF is in town. I have gained weight (30 pounds) which I'm not too happy about. I looked up PCOS and I'm scared that might be the case, or maybe I'm finally pregnant or maybe I'm just stressed.  Opinions?