Thanks for writing your query.
After reading your post, it seems that you are having your symptoms due to Urinary Tract
It is usually associated with fever,back pain
Following investigations may be helpful :-
1. Urine examination(Routine/Microscopic and Culture/Sensitivity).
2. Complete Blood Count(CBC).
3. General Blood Picture(GBP).
You should also measure your temperature.
Drink lot of pure water daily.
Medical management can be planned according to the reports of the above mentioned investigations.
I hope this is helpful to you.