Mucous plug after sex.

I had sex last night for the first time in a month. I am currently 19 weeks pregnant and I feel like I may have lost a quarter size of my mucous plug. I honestly don’t know if that’s what it was or if it was just left over from sex. It has been so long 🤦‍♀️😂 There was no blood and I haven’t had any bleeding whatsoever. Should I contact my dr tomorrow or should I go to the er tonight?