Bleeding after sex. 6 weeks pregnant

My husband and I had sex about 7:30pm tonight. When I got in the shower I noticed I was bleeding. Color was red like fresh blood. I called my dr he said no need to go to the ER just to wait it out. Well now it's about 9:30pm and I'm still bleeding and even having a couple clots. I'm not having pain just a minor cramp on my right side like in my groin. Im nervous and kinda feel like I want to go to the ER but my dr said that wasn't necessary. I just want to make sure everything's ok. :(