Possible miscarriage?!

I'm supposedly 5 weeks pregnant. I started bleeding after having sex with my husband. I'm think my cervix was just irritated. I was really tight and my husband also noticed something felt different. It's been steady now for a day and a night, I'm not filling a pad but when I pee theres goopy clots every time and it's a dark red/ bright red color. Day before we had sex I noticed some very minimal brown spotting I didn't even need a liner. I'm calling my doctor tomorrow but I want to know if anyone else has experienced this?