Is this my mucus plug?

Im 37 weeks && I have been having contractions 2-6 mins apart since yesterday with bad lower back pain. Went to triage Yesterday and I was 2cm dialated 60% effaced, so they sent me home and to come back if anything changes.

This is Not my first pregnancy but this will be my Vbac bc i did have a c section with my first pregnancy with no labor pains nothing..

(They did confirm they were contractions)

But I only live 15 mins from the hospital.

Well today I go to the bathroom and whipe and see this. Could it be my mucus plug ?

Of course I touched it, its very thick, brownish streaks, and unable to be torn apart...