Bleeding during sex

Has anyone else experienced this? I had a miscarriage with my previous pregnancy so this has scared me a lot. I had a scan this morning which showed my baby is 7weeks2days and has grown in the last week, heartbeat fine. Me and my partner have just had sex and afterwards realised that I'd bled quite a lot over both of us. I'll phone my doctor in the morning and see what she says but I was just wondering if anyone else has experienced this.

Thank you x