Sex and Bleeding

Amber
I am 8 weeks pregnant. When I was 6 weeks, my husband and I had sex and I started bleeding profusely. It was a lot of blood. So we went to the emergency room and they did blood, urine and an ultrasound. Everything was fine. 
Tuesday we had our first baby appointment and everything was fine. Now today, my husband and I had sex again and I'm bleeding again. I called my doctor and she said to go to the er of its more than just spotting. But it's exactly like last time. So I am going to see if the bleeding stops and if it doesn't I'll go to the er. 
Has anyone else experienced this? I hate to stop having sex for 7 months. Obviously I will, if I have too. But it's so frustrating.