Hope I am being treated for the correct problem

I was having severe pains in my pelvic region.  I waited for a week, hoping that it would go away.  I took myself to urgent care and they said I had a UTI.  I don't have any of the symptoms that I've read about that are common.  I know that they take a sample of urine and look for the bacteria that's in it.  I'm on a sulfa drug as my antibiotic, this is day 4, and I still have the cramping.  

My cramping started after my period.  I was sick to my stomach the day following my period, and the cramping started right after.  The cramps feel like contractions.  They were/are coming an hour apart.  My bowel movements aren't the same..I haven't had a real solid movement, yet--I haven't  had an appetite to eat either.  Are these symptoms of a UTI or something more serious?  I've also been running a low grade fever--even on the meds.