Sorry, she doesn't look gravid to me so much as way overfed.
A female about to lay eggs will almost never eat. Not for weeks or even months before she lays. I would give her about 14 days before feeding again to see if her appearance changes. Personally, I'm not seeing the ridgeback at all. Girls get that within a week or so of laying, and it is VERY pronounced. Since she is swollen so far down near her vent, it looks to me like she needs to poo like a st. bernard. I could be wrong of course, but from 1300 grams to 22oo in a month? Even a gravid girl doesn't gain that much that fast. If she were gravid, she would slowly gain over a period of 4 to 6 months, not one.
Bump up her heat just a tad, and give her a solid 14 days with no food, just to see if she changes. She won't be harmed by the lack of food. In fact is she's having trouble with the heavy food load, it will be good for her. If she doesn't poo a schnauzer sized poo in that time and shrink down some, you can feed her again. but don't go so big. It is much better to feed smaller prey items than larger. Even my 6' long 3500 grams female doesn't get a large rat. Her's are around 100 grams, sometimes a little bigger. She does just fine on those.
To be honest, I kind of hope she is gravid, because baby snakes are very cool. But considering you sound very nervous about it, for your sake I really hope she's not until you are ready.
Gale