Hi thanks for your question.
You have history of recurrent UTI,with latest urine examination normal.One thing wrong you did you have stopped drinking fluids.In UTI you don't have to restrict fluod intake,infact you have to increase your fluid intake to flush you urinary tract
of any thing that may be responsinle for recurrent UTI.The hurt at the end of urination could be due to urethritis
or small bladder stone
I would advice you to get your urine culture and ultrasound
done and consult a general surgeon
who may be able to examine for to determine the cause of recurrent UTI.
Finally take plenty of fluids.
Hope this answers your question.