Hi I Am A 16 Y/I Girl And I Have

Hi I am a 16 y/I girl and I have been experiencing very stinky urine. The second problem is that I have aome burning feeling when I pee only sometimes though. I have been going pee way more often and today I was sitting in class and I think a little pee dribbled out. Enough to make a quarter sized mark on the back of my jeans. I am not sexually active. Is it a uti? And how common is it to have pee dribble out durin a uti? Thank you in advance