Sounds like from what you described, she is stressed out like crazy. Can you give us more information on her husbandry, feeding times, how long you've had her, etc. This is all going to help us narrow down the problem, just coming on here and listing her problems isn't going to help us if we don't know how she is kept.

For the force feeding, this is REALLY stressful and could definitely cause a snake to bite. What size food did you try to feed her, how often did you try? Once again, information is key.