It's been a few weeks but just an FYI for those who helped me and are
interested in the outcome of the circuit which was out. It ended up
being a fried neutral behind my medicine cabinet. The medicine cavinet
hid a huge cutout in the wall. The wires were in the wall (not in a box)
exposed and TAPED, not wire nutted. All neutrals were tied together as
were all blacks (3 each) then the wires ran through a hole in the wall
into the rear of the three lamp fixture above the cabinet and the rest
continuing the run. The romex wiring was old and brittle, but there was
corrosion and burning. The scary part is the thought of it catching fire
because you could clearly see the burn marks on part of the wall.

It took awhile because I upgraded my service panel. When I learned it
wasn't in the panel, I went back to the search with my hunch to the
bathroom fixture since the main wire started from the panel to the bathroom.

The more I remodel or repair, the more I learn whoever did these jobs
was an idiot.