Pregnant?

To begin, this is an adapted feral cat. Though she usually sleeps with me and is at times affectionate, I cannot perform a manual inspection. I can't even apply flea medication or take her to the vet unless she is very ill.
She's been spayed, she showed no sign of heat, yet she shows these signs of pregnancy: enlarged breasts, very wide across the middle, increased affection, nesting, a period of very heavy eating.
Then she began eating sporadically, as though there wasn't room for both kittens and food. She ceased nesting. I got kitten chow to increase her caloric intake. It's been months, I noticed symptoms about the beginning of September. She remains very large in the manner of being pregnant, not in the manner of being fat, and still has enlarged breasts. But she eats normally. I wondered whether cats somehow delay birth during winter. Now I wonder whether she's actually pregnant.
Any thoughts?

If it's been months - she is not pregnant. 63 days is a pregnancy term. She needs to be seen by a vet - there is probably something wrong. I know it'll be hard to get her to a vet, but this could well be a life/death thing.

Talk to your vet about her being feral and see if he or another vet in your area who works with ferals can come up with solution for you to help her get into to see a vet.

If she was preg she woul have had kittens already.
It can be a false preg or something else.
I would call the vet.

The consensus is undeniable. I thank you and will take your advice.

I'd do my best to get her to the vet. Could be a false pregnancy. Cats will have kittens in 63-68 days and don't "delay" having them in bad weather. Something else is wrong with her.