I have a question!

[Stewart_Reptiles]

He claimed she was gravid

Which would mean he has witness an ovulation, if so do you know when he would have seen that ovy (that would help knowing how much time you have left)

he said in both October and November locks happened. That sounds like it would be too early for me

Not too early I have several females that have ovulated and I even have eggs

Or is it totally possible that they locked only in October or November and she's only just now going to get gravid?

It is possible too their is no specific timeline from witnessing locks and getting an ovy, the only guaranteed time line is from ovy to eggs the rest may vary.

More info: He also brought the male over for a "sleep over" and they didn't lock - the male seemed to be trying, from what I've read, but the girl just didn't seem interested. I don't know if this is a sign or not.

Females are not receptive everytime paired and it does not necessarily mean that they are done, I also doubt that you stayed up all night to watch so you really do not know what happen.

Right above her tail does seem to be a little swollen

Can be something else such as soon to come bowel movement.

The past two days she's been loving the hot spot in her tub, laying as close to the heat as she can get.

Again while female that have ovulated seek heat, it's not a guaranteed sign,female do not need to be gravid to prefer the hot spot.

Now here is something fairly simple that might help you determine where your female currently stands at http://ballpython.ca/gallery/breeding/ (I think it is a great guide for beginners), understand that without examining the animal in person it's very hard for anyone to confirm whether or not your female is gravid especially based on your description.