I feel for you, Entocort is really expensive and I don't know how drug companies expect people without coverage to be able to pay for that. Unfortunately there's no generic version of it either.
A couple of options you can try include: you can check with your doctor, pharmacist, or the maker of Entocort to see if there are any discounts they can offer you. Your doctor may also have free samples from the drug rep that they can give you.
Otherwise, is prednisone an option for you? The reason Entocort is so expensive is that is has a special coating so that the medication doesn't get released until it's at a specific spot in your intestine (the area where the small & large bowel meet). Prednisone is the same type of drug, but it doesn't have that coating so it goes throughout your entire body instead of just to one spot, which is why pred tends to have more side effects associated with it. But pred is cheap, much cheaper than Entocort, so that is something to consider.
And as far as your hospital bills, check with the hospital and see if they offer any sort of financial assistance program (they should). Even with insurance, last year I racked up about $6,000 in doctor bills, and I applied for the financial aid program even though I didn't fit the criteria, but I got approved anyway, so my doctor bills were eliminated.
I know it is overwhelming sometimes to work while you're so sick and in pain. One more suggestion for you is to apply for Family Medical Leave (FMLA). That way, you can take sick days due to your illness (unpaid, unless you have sick time or vacation time you can use) and they can't fire you due to absences.
Good luck, I feel for you and I hope you are able to get some relief from the pain and the bills!