Whichever hospital you were at should have had a "social services" person- they should have spoke to you before you left. You need to get a hold of them, explain that you are without insurance. Every state offers temporary health insurance to low/no income people. (It lasts usually 90 days...) Also, ask the pharmacy you are getting your shit filled about discount programs. There are little cards in the front about them, they're not much, but they help. (Even the tiny little pharmacy in my <1800 people town has access to them...) If they're totally ass-backwards from the rest of the world and don't, google for one.
If the social services person at the hospital is a dead end for whatever reason, get your ass down to the local human services office and tell them you had a goddamn life-threatening condition, explain what, and apply for temporary insurance. No amount of pride is worth dropping dead over a goddamn bite.