E.R. might have . G. I. available, however would caution that if not, they may want to do unnecessary and costly testing. I have been through this after initially being diagnosed with UC and arriving at the E.R. malnourished and dehydrated which led to me not being myself. This led the E.R. doctor to want to do a spinal tap because she was thinking something neurological. We of course declined. Funny because I also arrived at the hospital attached to TPN. So as Scott suggested, bring information with you. I might consider the Urgent Care as well and then follow up with finding a good GI doc.