UPDATE 30 weeks, white mucus leakage TMI

Avril
Hi all, 
Sorry for the icky pictures but just had what I think is some of my mucus plug come away. I'm 30 weeks  I didn't have this with my first so any advice or shared experience in this please of what it could be. 
UPDATE
I've lost some more this morning still no pain and baby moving fine ....... any advise please. 
The picture with blue toilet roll is from this morning x
Thanks xx