What the heck is this?

[Lord Sorril]

Oh wow. Good to know. I’ll definitely make an appt for her then. So you have seen cysts before in a BP? I didn’t even consider that. They are kind of squishy but definitely well-formed, if that makes sense. This is the second in 2 days.

I have not experienced the same issue, but, I know other breeders who have...one or more cysts in the reproductive tract would explain the delay in releasing underdeveloped slugs as well as the odd discharge.
It may be contrary to popular opinion, but, I do not think the imposed stress of a vet visit is mandated at this point.
In the event that you do take her to the vet...then I will be interested in hearing their testing results and subsequent findings.