Should I be concerned?

My period ended 8 days ago, my husband and I have BD everyday since the day it ended. Yesterday (according to glow) was my start of ovulation. I had very light spotting yesterday, cramping early this morning (very little) and then this evening I was spotting ago (like a red streak through CM). Should I be concerned? Have you had this happen before. Help? I'm trying to stay calm but I'm afraid this is affecting my fertility.