questions

I've been to the er once because of bleeding after sex. I'm talking bright red bleeding plus cramps. They basically laughed at me even tho it was more blood then a pad. Anyways fast forward it's a month or so later and I just had sex an hour ago and I'm having dark blood now. Like looks like dirt. So I'm not too worried. It's old blood anyways. Is this normal? Do y'all bleed or anything after sex? How often should I feel him move because he hasn't moved really at all today. I'm 27 weeks tomorrow and just over thinking. What's normal and what's not?