Thanks for writing your query.
After reading your symptoms, it seems that you could be suffering from Urinary Tract
It can result in increase in micturation along with abdominal pain
, nausea and weakness.
You should get your urine examined for Routine/Microscopic and Culture/Senstivity.
Also get your blood investigated for Kidney Function Test and Complete Blood Count
Also get an Ultrasound done for lower abdominal region.
Drink plenty of pure water. Treatment can be planned according to the reports of the investigations.
If the problem persists, get yourself examined by Urologist
I hope this is helpful to you.