My wife has a fever that comes and goes, slight nausea that seems to come and go and constant neck and back pain, this developed three nights ago and gotten worse. Yesterday she started breaking out in hives or welts on her arms that are getting bigger in size and numbers. We went to the ER and she had a chest x-ray, a blood sample and a urine sample. All came back okay, but this was yesterday and last night and today she is a little worse. The bigger hives or welts I noticed just tonight. I am concerned about meningitis, but that wasn't a concern at the ER when I asked. Is it possible it was missed based on the tests that were performed? If so, should I take her back to another ER?