Help! Not eating!

[Bogertophis]

So I’ve had my bp for a couple years now, and shes generally been ok,(took to the vet once due to tip of tail losing circulation due to stuck shed) and lately she hasn’t been eating. It’s been a little over a month and I’m getting nervous. When I tried to offer her food today she shied away from it at first and when I heated it up some more she struck and constricted but then became uninterested. I have hides on both sides and temps are 75ish on cool side and 90 on the heated side. Is there something wrong or is this normal? ....

Are you the first owner? (so she's about 2-3 years old? are you sure of the gender?) What is her size? (wt. & length)
How often do you normally feed her? -what size prey, & are they rats or mice? She's very pretty, by the way...

When BPs get to be adults & breeding age/size (about 3+ years old) they often "decide" to fast at times. This varies quite a lot & frustrates us but it's usually normal.
However, you need to rule out other issues just the same. You mentioned the tail problem, what's the humidity in her cage? (you may need to cover
more of the screen top to get the humidity to stay up...and you can also put in a "humid hide".

Are you SURE she just isn't going into a shed cycle? It's much harder to see early warning signs on a snake like yours (light color) but they often know long before we do.
The behavior you described is typical for a snake that knows it's going into a shed...OR one that knows (by temperatures & length of daylight) that winter is coming soon.

Temperatures are also critical for BP success...your "cool side" might be a little low at 75*. What part of the cage does she spend most of her time? Sometimes we have
to read between the lines...