Albinos and Shedding

Hey there! I was wondering how to tell if an albino cornsnake was shedding or in pre-shed.

I noticed that she had some regurgitation movements the last time she ate, although she ended up not regurgitating and took her meal well. The food wasn't large either. I heard that if you feed your snake in pre-shed they can regurgitate.

Aside from that I noticed that she hides a lot lately. I added a hide box and I keep it humid, but she stopped hiding there after two days. I haven't been handling her since the last time she ate and it's been 5 days. She has been moving around but from only two spots- her hide box on the cool end and on top of a plastic tree on the hot end.

I wonder if I should feed her this week or skip and if there are any other tips for me when it comes to letting her shed.

Thanks so much!