STD or UTI?

[JD456976]

Hello,

Thank you for your time and input.  Below are the circumstances surrounding my question:

I was dating a girl and thought I was in a monogamous relationship, so much so we had been tested for STD/STI's before and were both negative and had unprotected sex.  The relationship ended approximately three months ago.

I am now seeing a new girl and we had unprotected sex approximately 1.5 months ago.  She just disclosed recently she developed what she believes is a bladder infection.  She described her symptoms as a burning sensation when urinating, frequent desire to urinate and some abdominal pain.  She saw a PA who prescribed Cephalexin 500mg/3xday.  She's been on them for 4 days now and her symptoms have been reduced but she still describes a mild burning sensation and cramp like in her lower abdomen.  

I have had NO symptoms of an STD or bladder infection at all.  

My question is she more symptomatic of an STD or UTI? Online "research" indicates gonorrhea usually has a short incubation period of days and that if she would have been infected, it would have appeared sooner than a possible exposure from me 1-1.5 months ago.  

Thank you once again for your time and input.