Mucus plug? TMI picture!

A bit of background to my pregnancy, I was carrying twins but sadly lost one at 17 Weeks (Now 33+4), I’ve been told I have a risk of preterm labour due to this so I’ve been anxious to say the least so every new twinge or niggle has me on edge

!

I have lost little bits of my mucus plug throughout the pregnancy which I mentioned to my midwife who wasn’t concerned, but over the past few days I’ve had a few pains low down then I lost this around half an hour ago, should I be worried?