What's going on? Help please?

Devin • My biggest dream is to be a mommy, I will make that dream come true!
April 2,4,5,7,9,11,12,14,23,25,&27 I had sex. The 18 thru 22 I had a normal menstrual cycle. The 23 thru 24 I was spotting, now may 5 I spotted... I just had surgery may 1st so they did a urine PT. It came back neg... Does anybody know what's going on? It's honestly pretty annoying considering I'm TTC and not having a lot of luck, but I seem to get my hopes up a lot:/ please someone give me an idea on what's going on...