How do you know if you’re slowly looking your mucus plug or if it’s just regular, clumpy discharge?

So I’ve had snotty sort of clumpy yellow/clear discharge in my underwear for the last few weeks now, but it got me thinking would I even know if I lost my mucus plug?

I’m 33w5d and have never had blood in it, but I guess it’s stringy and it’s only like little bits at a time.

This is my 3rd child and I never ‘lost it’ with babies number 1 and 2..