Spotting during sex..6Wks

Have anyone experienced bleeding during sex? I had a miscarriage back in June 2016 I got pregnant again July and I'm now 6wks. We stopped once we noticed the bleeding and there was no more spotting hours later. I am planning on calling the doctor Monday morning, I'm afraid I'm having another miscarriage. Has anyone went thru this? I really don't want to go thru another miscarriage but I know it's a harsh possibility.