Bright blood on undies...Tmi...No pic

I'm exactly 34 weeks. Both the times that I went to poop. I noticed small (pinhead size) blood spot in my undies. So I checked the tissue but it was clear. There was no sign of discharge. I wonder what's going on. Also, yesterday night I took an extra effort to bend down a bit more in the shower and scrub my bottom as I was feeling unhygienic. Now could this blood be from any hair pull or any skin I might have rubbed very hard? My baby is moving.There is no cramp, contraction, backpain or anything uncomfortable. Please tell me what's going on.