Confused or should I be worried...

My lmp was April 21. I ovulated on May 5th which is also the day I BD with my love. May 19th was to be my AF day. It came and went. Today marks 11 days past AF date. I woke this morning to slight bleeding. Nothing I need a pad for. Been wearing a pantyliner. Should I be worried? Last time this happened was in 2010 when I found out at 12 weeks I was pregnant. No rude remarks... If you don't have nothing nice to say, then don't say it... TIA