Thanks for the query.
If you have severe back pain
and increased frequency of urination it could be an infection. You need to do an ultrasound
to rule out underlying obstruction or stones which could explain the pain.
Presence of proteins in urine can be due to infection. However it often is a sign of underlying kidney
Therefore you need to see a nephrologist
who will review all the results and order further investigations to find out the cause and advice further treatment
Hope this helps