Pelvic discomfort/pain 3 weeks

So over the past 3 weeks or so I have been having pelvic discomfort, it's almost like I need to go to the bathroom all the time though even though I don't. It is hard to explain how it feels. It seems like it started in my lower left abdomen and moved to the center and now it has moved down to the pelvic area. I am 50 yo male, reasonably active and have recently given up on soda, and have seriously cut back my sugar intake, to almost nothing. I thought I may have a UTI, or something like that. It has been this way for as I say about 3 weeks or so, thought it was a stomach issue at first but that seems not to be the case. Anyone have any advice, suggestions, etc...?

Sounds like prostatitis.You need to get your prostate checked out. See your doctor or a urologist.

Thank you, I have an appointment with my GP on Wednesday.