As bcr229 already said: no food for 3 weeks, to give her time to build up digestive enzymes again, otherwise another re-gurge is likely & very detrimental.
I also second the use of probiotics in or on the next meal: I've found that I get more Nutribac into a snake, not by dusting it on damp fur, but by using a small tool*
to pry open the rodent's mouth as wide as possible & putting the powder in their oral cavity where it will not fall off while the snake is swallowing, nor will the odor
cause a finicky snake to balk & not accept the prey. (*rodent teeth are sharp & germy- you don't want to damage your fingers doing this, a small screwdriver or
most anything works better...rigor mortis usually makes the jaw muscles stiff but this is do-able. Push the mouth closed once you fill it with the powder.)
Your snake might just be going into a shed and the larger meal just didn't "feel right"...snake's bodies use extra hydration both to shed and to digest. Some have
trouble doing both at the same time, & snakes seem to know (feel) a shed is coming before we can see any tell-tale signs.
As posted above, subsequent meals should be much smaller while your snake gets back on track.