Gray banded king - sick? Help!

[Laceysnake]

I've been having some trouble getting my snake to eat.

She is a 2 year old gray banded kingsnake and I've had her since May. She has always been a great eater. Usually I feed her two frozen thawed hopper mice every week. She usually eats them right away but the last month or so I've had some trouble with her.

It all started with her second to last feeding. She ate two mice as usual but ended up regurgitating them the next day. I waited to feed her till the following week, and she ate two more mice just fine. She kept them down and didn't have any issues.

Since that last feeding, she has had no interest in eating again. I think this is about the 4th week now that she hasn't had anything. Her temperatures seem normal, I haven't changed anything. She has an under the tank heater but generally stays on the cooler side.

I know snakes can go some time without eating, but I'd like to figure out why she has no interest. Do you think its the season?

I know many reptiles go through brumation this time of year, but I've had a hard time finding out anything regarding gray bandeds specifically.. Also, if this is what is causing it, do you know if I should just let her starve herself for this period, or is there something I can do to pull her out of it? She still looks like she is at a good weight but I don't know how long she should go.

There is also one other thing. I thought I was imagining it but it seems much more obvious today... The lower part of her body, from just above her vent and an inch or so higher seems swollen. She may have lost a little weight so it seems to stand out more today.

She had an appointment to see a vet on Friday but I would appreciate any input you all have! This is my first snake so I am still learning!

Thanks!