No idea how old she is? Something's not right with her, unless she's going into a shed? She shouldn't be trying to brumate either. What is her warmest temperature for digestion in her home, where SHE is?
Just because you provide a "heat light" doesn't mean the warmth actually reaches the floor of the enclosure where the snake is- I've seen this before in a 'nature museum' where the A/C for human comfort made it too chilly for snakes to digest. But corn snakes often prefer most of their enclosures to be mid to upper 70's, & they don't require more than one corner of their home to have extra warmth for digestion, & you don't want more than about 85*- not like a BP.
Is it possible she was handled roughly & has an injury? or she's possibly ill? A stool sample to vet is a good idea if she's not in shed & keeps refusing food, & acting oddly.
Snakes are very stoic, & btw, albinos are extraordinarily hard to tell when they're clouding up in a shed cycle- with any luck, that's all it is. (turn out the lights & use a small beam flashlight to shine across her eyes from either side- they'll look milky if she's in shed-)