Bloody show -36 weeks (4cm 50% -2)

How large can a mucus plug be? This was from yesterday at 11am and right before I lost this, the largest first piece, I was 2cm 50% -3, so when I went back to get checked I was then 4cm 50% -2 after this piece came out and then the last picture is this morning 9am (in order) I assume I lost majority but I’m surprised to still see blood tinged mucus. Considering she said my cervix is still 4cm 50% -2. With my first I lost a small piece with dark dark red old blood nothing crazy and had him a week later. Then my second I didn’t notice it at all, probably passed it in labor in the hospital. So I guess this a good sign? I’ve been in latent phase for 96 hours now and I’m sooo over it 😩 every nurse said 3rd babies are the most difficult 😩😩😩