s/o UTI....anyone have this problem..

rosesandpeonies

So after I go to the bathroom I feel a straining feeling (sorry if tmi)...I do not have it while or before...I have no issues in that way it is always after.  I have gotten this when I was not pregnant and it usually was because I was not drinking enough fluids...so that is what I figured it was so I upped my fluid intake.  I spoke to my dr. and he agreed...but this has still been going on for over a week.  All my urine tests came back negative...UGH!!!  any thoughts?