Bleeding mid cycle?

Pamela
Hi guys! I've never posted on here so I hope I'm in the right place!
My boyfriend (now fiancé) and I started TTC in December of last year. We got engaged towards the end of April and decided we would stop actively trying until after the wedding, which is this August. 
My last period started May 2nd and lasted 5 days. Then the 12th I started to get some light spotting which has gone on every day since then. Does anybody know why this could be happening?? A friend of mine suggested taking a pregnancy test however my period was the same as usual, if not heavier. So I have no idea what is going on!
Any input would be greatly appreciated ladies!!