Need Diagnosis/Home Remedy?

It certainly sounds like it is a UTI, which can cause serious problems if left untreated and normally needs antibiotics to clear it up completely. The fact that the urine is clear may mean that it is the early stages but the other symptoms suggest that you have had it for a while. A few things that might help relieve the discomfort are to drink plenty of water to flush the kidneys through. Drink cranberry juice to change the acidity of the urine. But you should seek medical help if it has not started to improve with in a day or two. If it was a yeast infection your discharge is more likely to be a yellow/greenish colour smell offensive and itch. Personally I would seek medical advice because if it is a UTI which I think it is I also think the back pain you are experiencing is due to the problem reaching the kidneys so please see a doctor ASAP(as soon as possible)