Help! Tmi

Last night I wiped and found stringy blood discharge...little clear mix in....i put a pad on thinking my period is gonna come during the night or in the morning....today I still find the stringy blood discharge and this time with a little brown stringy discharge....i know the brown is old blood....wonder if this is my period or going to come or if this is the sign of pregnant. I have a almost 7 month baby. When we got pregnant....i had some blood discharge very thin but I don't remember clear mixed in or it being stringy. Sorry for the way tmi.