TMI Pictures of discharge

Ive had discharge for 3 days straight every time i use the bathroom. I had bad contractions have been sent home 2 of the days. Is this discharge normal i know its my mucus plug but for 3 days?? Sometimes theres sand size pieces of skin in it. Im still contracting and in a whole lot of pain but was told not to go back to triage till my contractions were extremely painful and 2 mins apart. Walked for 2 hours at the hospital last night still no cervical change from 1cm which i was on tuesday. My ob did not check me because she said ive had it checked 2 days in a row and it probably wouldnt have been differe t. My contractions only started getting painful yesterday around 6pm. Should i be worried about the discharge?