Mucus plug or semen?

Geri

So I though I would definitely recognize my mucus plug but here is the thing..my husband and I had sex and on the next night when I was in the shower I pulled out a few pieces of stretchy gooey white thing that I instantly thought was MP but now that I’m thinking about it, could it h e been old semen that turned gooey and snot like. The same thing happened the next day.