My belly button has never popped. It gets really wide, though. And I have weird little bumps in the skin above it.
Mucous plug...I had the dubious "pleasure" of seeing the whole thing with ds1 (& I never saw any with the other 2). It was *huge*, a giant blob of whitish-clear "snot" as some one else said. Really gross. It was about the size of my fist. I'd bet what you've been seeing isn't EWCM, but part of your plug.
Nothing much going on here, although my mom has gone, so yay! for that. She was only here for a couple days, so I figured it'd be ok. Really did not want to birth with her around. I'm 38 +2, but not really expecting baby until at least 40+3. We still need to do a test fill/drain of the pool & put baby clothes someplace.
I've had a couple contractions, which is unusual for me, but this pregnancy has had lots of little surprises.
I'm keeping busy by starting a knitting project...making everyone Christmas stockings. Just hope I'm up for it, I haven't made anything more complicated than afghans before & I've had to enlarge the pattern.