How's the shed? One piece? Pieces?
Do not offer food until she's completely done shedding - as in all the shed is off.
She probably will not eat and it will just stress her out more.
If you are unsure if she's completely shed, and you have to check, do not offer food for a couple days after. Disturbing her to check will make her less likely to eat. In other words, if you check on her today and she's completely shed, don't offer food until Friday. If you can see it's all off and you do not have to take her out or lift her hide, etc. to do that. Offering tonight or tomorrow should be okay.
You really need her eating and ASAP. I agree with Bogertophis. She looked very thin in the most recent picture.