When the regurgitating started, did you happen to over feed her? Or the enclosures lowest temp. below 78F? If it's brought on by too much food, or enclosure is not hot enough, or if it's caused by stress from the mites, you'll want to start off really slow. From the time she last ingested a full meal, wait about a month before feeding her again, and don't handle her for about a week prior to the feeding and a week after the feeding, make sure the meal is not too big, and the enclosure is at least 80F for the low side for a while. Repeat this routine for about 3mths. Then slowly go back to normal. If she regurges during this process; no food for a couple of weeks, not handling her. If this routine doesn't have evidence of improvement at all, I suggest you put her in brumation (read up on it first), after a few months her system should be completely healed from any shocks or trauma. then you treat her like a new snake, don't over handle her, overfeed her, or place her in high traffic areas. Good luck, this process worked for me on some problematic feeders I've dealt with in the past.