"
I had been some where I came in. It was my bath room but reverse."
this has a
through the looking glass feeling to it, as if you've traveled into a
realm which is a reflection of normal reality.
the ingrown hairs are seeming to represent some abnormal pattern of growth.
removal of the slugs appears to be removing the parasitic energies responsible
for the problem.
the dream speaks of you having undergone a healing; discovering a malady
and correcting it -- all within an 'alternate realm'.
the unspecified explanation offered by the friend may involve instructions on
how to prevent a recurrence of something similar, and if you have no recall
of what was said it suggests that it's not information you need be aware of
on this side of the looking glass (let your subconscious handle that).
it may be that the issue addressed was specifically involving childbirth.
if you'd been contemplating pregnancy and having problems, this may be
a sign that the issue is resolved.