Help!

Okay, so my period isn't due for another 7 days, and a couple of days ago I had light cramping, but I knew it wasn't bad enough for it to be my period, and I never cramp a week before my period, it's usually the same day as my period that I cramp. Well last night when I went to wipe, I had pinkish blood on the toilet paper but not in my underwear! I'm still spotting like that a little bit, but not very much.. It comes and goes. And I feel like it isn't my period, because usually I'm cramping really bad, and I'm really not cramping at all.. Any ideas?? I've been trying for a baby too..