She is in a low-traffic area (my bedroom) which stays dark and warm. All my snakes are fed at night like always...there was no change there. She's not handled (at least not since she went off feed) and she's offered food once a week. When I was out and about, I found myself at the pet shop and purchased a live rat pup for her. I offered it to her and she ate it without hesitation (as in...she almost grabbed my hand instead of the rat as I was placing it in her tub...which is a first for her). I did not read your replies until just now (after I fed her the rat pup), so in light of this, I don't think the issue was her being too full (especially since she hasn't eaten in almost a month and lost 20g).
Also, the prey size is actually smaller than she needs to be eating, thus why I was feeding her a little more often. They were bought as "rat pups" (she should be on weanling rats/larger rat pups) but what I've been offering are more like large rat fuzzies (eyes still closed). It's all I have right now until I do my large rodent order in January.
I think the issue is that she's always been a picky feeder and she just wanted live rats instead of frozen. But thank you all for your imput anyway.