Mucous plug?

Hey ladies this is baby number 2! Couple days ago I went to the OB due to sever back pain. I found out I had a UTI and also I was 50% effaced. They really didn't seem all that concerned. Now today, I'm pretty sure I just lost my mucous plug.. I don't remember ever loosing it with my first one but not to go into graphic it was very slimmy and took me multiple times to wipe.. Should I be worried?