I'm sorry to hear about all of the struggles!!! This cant be easy for you, and my hopes and prayers are with you and your family.
Listening to what you said, my guess is that your daughter may be acting in reaction to the current situtation. Stress is often a trigger. Also, she may be looking to reduce her impact as she sees it on the family by not having you pay for meds, and not paying for school. A friend of mine took a similar route (shes has BP and ADD) when her mother was diagnosed with cancer. However, things worked out for her. There were many bumps in the road, but things righted themselves in the end. I wish the same for you and yours.
Best of luck and warmest wishes!!!!!!