do I have a uti?

Experiencing some symptoms! I'm drinking tons of water but barely yielding any pee. Yet I feel like I have to pee a lot and very often. It has a different kind of odor to it than usual. I'm having contractions and back cramping. Along w lotsssss of sharp shooting pain in my vag area. I'm looking for advice here until I can see my dr tomorrow as the office is closed. 35 weeks along now