Is this my mucous plug ? (The show) 36weeks

vi

I've been in hospital at the weekend with mild contractions and my 1st part of the cervix was open , the 2nd part was still closed. But they kept me in for 2 nights to monitor my contractions. They did calm down by Sunday and I was sent home. However today I'm cramping again and Last night something like this came out , and it once again came out today ??

What should I Do? Is this my plug?

Update, just had another bit come out