SnaKE not EATING PLEASE HELP

[OrientalSpade]

So here's the thing, im babysitting a banana ball python or my friend until august. Unfortunately, she is from petsmart, sucks i know, but thats not importnt right now.
According to the friend, she hasnt eaten since they got her at the store, which is about 3 months. I cant give an accurate size in grams, but here's a few pictures for reference: http://imgur.com/a/YazjU

Shes got one hide in her tank, and ill be adding another tonight, since i recently got the materials to make one. She had no heat lamp unfortunatey, as i have no way to regulate one at this moment, but shes got a heat pad running at a steady 90 degrees. she has paper towels for substrate, a nice big wate dish, and lots of fake plants to snoot around in

Now, ive tried to feed her twice since i got her a few weeks ago. once last week, and once this week. shes refused both times, and she always seems to shy away from the mouse when i try to do the whole 'dangle it in front of her' thing. now, i know its only been two attempts, but i have TERRIBLE anxiety and if she dies, it'll be my fault and i cannot handle that emotionally
on top of that, im going out o state this weekend, and staying there for two weeks and honestly im terrified
tonight we're going to try a medium or large live mouse, and if she doesnt take it..i dont know what to do.
id really love some reassurance, if there is any to give, along with advice, that, maybe she'd be okay if i left her in my room while im gone?