Is this a mucus plug???

hi guys, ok I know this is gross & definitely tmi but maybe someone who doesn't have a weak stomach or anything or even a nurse can let me know if this is what a mucus plug looks like? It's not blood tinged like they say it could be but I coughed not too long ago & felt this big clump come out of me. luckily I wear liners for urine leakage because this was gross & freaked me out. I've never experienced losing my mucus plug before. I'm 33 wks 1 day.