Weird discharge?? Due tomorrow (didn’t attach picture)

TMI ⚠️ I got my membranes swept for the second time yesterday and I’ll be 40 weeks tomorrow. I’m used to the watery discharge and I’ve lost some mucus plug so I know what that looks like, but I just experience discharge that reminds me of the vernix caseosa that’s on babies when they’re born (I’m not implying that’s what I think it is, I just can’t think of anything else to compare it to 😂) it was off-white/tannish and the amount was like the size of a nickel, and it didn’t wipe off underwear easily. Anybody know what this means? This isn’t on the list of discharges you expect before labor 😅