For all you pregnant ladies out there or used too be can u bleed darker red or does it have to be lighter?

Just wondering I started bleeding during sex which is irritating and now I'm having blood that's red not super light but red but not getting any heavier to the point where I need to wear a pad. I'm very irregular so idk when the hell my period is suppose to start so those who are pregnant or used to be does the bleeding have to be light or brown to be pregnant can it be a little bit darker red or does it matter? Cause I also know u can bleed after sex too which irritates the cervix so idk if my period is on the way or I'm just bleeding after sex and yeah it was pretty rough