advice please. so yesterday Feb 4 I had some bleeding that stopped after a hour and yes I know tmi I…

advice please. so yesterday Feb 4 I had some bleeding that stopped after a hour and yes I know tmi I had sex after that and then todag I go out with my friends and come back and the bleeding is back again. can't figure out what's going on. don't want to go to my Dr yet any advice.... kinda need it