Bleeding

Iranda
I've had bleeding from the time I was 4 weeks pregnant. I am currently 11 weeks. There is no clots or tissue. The placenta is on the left side not the cause of the bleeding. Babys heart rate at 9 weeks was 172. Sex doesn't happen often but when it does I bleed then too. It's doesn't happen everyday. Dr is confused too. Anyone have anything like this before?