could this be my mucus plug?!

Hi there. I went to take a poop. And I pushed kinda hard considering my zofran makes me crazy constipated. Sorry this is so much info and kinda gross. I went to L&D today to be seen for my headache that I've had for 5 days. And I just left. I'm not sure if this is my mucus plug. But still a little worried.  Please help!!! I'm almost 31 weeks!