I'm not a great judge of Yellow Belly unless it's really obvious so I'll let someone else chime in on that one. All in all the snake needs some more weight and then a lot of those irregularities will probably pass, however significant weight loss after only a month of not eating is not normal. My male hasn't eaten in three months due to breeding season and he has only lost about 60 grams. If she doesn't start eating for you after you get her some good husbandry I'd suggest a herp vet visit if you can.