3mo boa vomited and now in water bowl

[Bradisa]

Hi all,
2 days ago I picked up a female boa from a guy who had 3 that were 3 months old. All were active, handled well, and looked healthy. They'd all eaten 2 days prior. One of them was starting shed and so I assume mine is not far behind.
When I brought her home, I should have let her acclimate to her new home, but my kids were very excited and spent some time holding her. And to make things worse, it was a fairly cold day.
She later vomited up the mouse from 2 days prior. It wasn't just regurg I believe because half of it looked and smelled like feces.
I put her in her enclosure - the temps on each end are 88° & 78°, humidity at 30% (I spray water on the heated rock to raise it from the current 20% humidity).
She's been camped out in the water bowl for 2 days. Waters clean; no sign of mites. Eyes are still clear but I do believe a shed is imminent.
I don't want to over think this and I don't see other signs of concern - she is alert and tracks my hand when I reach in. She does move around in the bowl. But the vomiting has me concerned.
First, how long should I wait before trying to feed her, considering she vomited 2 days ago, which means her last meal prior was about 12 days ago?
Second, if she's just hanging in the water because of the shed, should I move the bowl over to (or closer to) the warm end? She feels so cold and when I move her to the warm side she waits about 10 minutes and then returns to the bowl.
Thanks in advance for any help you can give me.