I had similar sympthoms last november.  With me it was my gall bladder.  The doctors said that this was unusual and a lot more dangerous than when people have the normal symptoms, because it can be easily missed.  My gall bladder was beyond help, because it was full of cysts, rather than crystals. So, find a way to go to the emergency room, it's better to be in debt than have something worse happen.

I agree with 1turkey1, you need to be seen asap.  If you are truely concerned about the money issue then look for local churches that might have outreach clinics.

I would go to any County E.R. and tell them your symptoms asap!