For an adult ball python I would wait four weeks before offering another feeder, it won't starve and it will need time to recover from regurgitating. In the meantime double-check your heat sources and make sure they haven't failed, if your snake is cold it can't digest its food.
After four weeks offer a feeder a size down from what it normally gets, dusted with NutriBAC probiotic powder (you can get it on Amazon). Wait three weeks and if it hasn't regurgitated then offer another small meal. If that's ok then offer the same small meal after 14 days, then put her on a 14 day feeding schedule.
If she regurges again take her to the vet to be checked for parasites, crypto, etc. If her fecals are clean you may be looking at an internal physical blockage that would require surgery, one of my retics had that a few years ago.
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