11 weeks pregnant. after intercourse lot of bright red blood. after visit the toilet it calmed down. days after, mucus and brown blood. misscarriage?

Probably not: Cervix can be somewhat sensitive during pregnancy and can be easily irritated causing some bleeding. One must also thing about infection leading to irritation of cervix as well. Miscarriage is a possibility but sex would not cause a miscarriage. Best to consult your ob doctor and be evaluated. Hope this helps. Best of luck with your pregnancy. Dr R