37 weeks today & mucus plug?!

ellie

I've woke up this morning at 37 weeks to a thick white/yellow 'discharge.' At first I thought it was just discharge but it's very thick and snotty looking and I've been to the toilet 3 times and each time there's been a good blob, which isn't usual with discharge. Is this the start of my mucus plug? Also having BH and lower back and belly pains!