Please help! Any suggestions would be great!!

My fiancé and I have been trying to conceive for the past seven months. Yet, not luck. I started using glow and keeping track of my periods and ovulation a time. Well, last night my fiancé an I were sexually active. He did not ejaculate. But, I started to bleed a very small amount. It was a dark red and eventually started to turn brown. I didn't bleed enough to fill a pad or a tampon. It was mainly just here and there I would bleed dark brown blood. I didn't need a pad while I slept it was so light. This morning it was on my toilet paper when I wiped. Could this possibly be implanting bleeding?? I expect my period in a week or so. Please help!