Mucus plug? *tmi*

FTM, please no judgement.

I'm confused, I just had intercourse with my partner and as per normal went to the toilet, did my business and stayed put cause usually I pee the minute I get up😂 well this time I heard a loud 'plop' and decided to have a look to see a blob of thick cloudy cream/yellow, bigger then a 50 cent coin.. I'm unsure if this could be semean or mucus plug, cause I've never had this after intercourse before.