Hi,
One of the best indicators is weight - did you weigh her when you first got her? They can go for quite a long time without eating but weightloss is the best guide to knowing when it's getting worrying.
I wouldn't worry too much about the retained eyecap just now really as it should hopefully come off with the next shed.
What are you using to measure the temps and humidity? ( just to check it's accurate).
She sounds like she's been going through a lot recently - has everything apart from the eye cap been resolved?
And, though this is purely me being nosey, what is the humid hide your going to get? I'm just using tupperware boxes with holes cut in them and regularly changed peat in the bottom of them.
dr del