My wife has had a metallic taste and dry mouth for a few days. She went to the doctor and thought her endometriosis was back because she has had a bad pain on lower right side and back. She has been drinking more than enough water but every time she drinks anything she has to urinate too frequently. When she does urinate it is very little at a time, but a lot of times! About 10 months ago she was very sick and the doctor said her right kidney was inflamed and she had kidney stones. Should I take her to ER or wait until Monday. The taste, frequent urination, and back pain are really bothering her, but she doesnt know what to do.