Hi I'm 18 week and 5 days pregnet now I went to doc they said I had a infection put me on tablet but then I di?

Hi I'm 18 week and 5 days pregnet now I went to doc they said I had a infection put me on tablet but then I dischard lump stuff. Now it liq but greenis kinda then today the each time I go wee I wipe and there like a pen dot or to off blood is this bad some one plz help me