Sex to induce labour/Mucus Plug

Sorry for gross details ahead-

my husband and I had sex about an hour or so ago now. I always clean up sperm and go to toilet so it pretty much always feels like it’s mostly gone from Vagina . Like I don’t get any in my knickers later on etc.

Just now all of the sudden my knickers felt wet at the top part so I went to mirror and looked at Vag and there was a clump of white thick discharge (the thickest I’ve ever had) above clit.. No smell.

So now I’m not sure if that could be mucus plug or I’m just overthinking it all!! 😅

Help please?

(39wks)