Cant tell if this is a UTI or not...?

Today I got my period. I've had UTIs in the past...but this morning I woke up from a burning sensation and an urge to pee. I thought, "oh god, not this again!!". So when I got to work I chugged a bunch of water and the pain subsided and I was able to go again normally. Now as Im sitting here typing, I kind of feel the pain coming back...what should I do? Is it a UTI?