Help please.!*!*! please!!!!!!!?

i went to the docotr yesterday morning and got a colcoscapy (cant spell srry) done to check on seom pre cacner cells... well they said i would have brwon discharge from it.. today i was walking in the store and felt this nasy thing so i went to the ladys room and there was nasty stuff in my under wear but not like regular discharge more like stringy gooey snot like looking sutff(sorry best way to describe it) i am calling my doctor in the morning any ideas is this the discharge they were talking about? i am 27 weeks pregnant with my 3rd child had pre term birth wih my 2nd at 22 weeks. and maybe wondering about mucus plug? never noticed loosing it with my other 2 chldren. i know you guys are not doctors but any ideas will ehlpme till morning thanks so much