Help !

I have chunky discharge that switches to yellow . 
I have been checked for uti and every std and it all came back clean.
I'm sexually active with my boyfriend and he is aware of all this.
Ever since we started to have sex I have had a hard time holding my pee. And for a little bit I peed blood. 
I don't know what's going on and the doctors just keep trying different pills and saying it must be a irritable urinary track. 
Is there anything else it could be? Has anyone had this?