Someone help please!!?

I think I have a UTI. I don't have a fever so my mom said I don't have an infection, but I have all the symptoms. I need to pee so bad and I can't. I can only pee very small amounts at a time. If I take some of the AZO stuff, drink a bunch of cranberry juice and water, and get some rest will I start to feel better soon? It's been like this for 2 days and its keeping me awake. It's 6:00 A.M. and I haven't slept all night and I'm so tired I'm shaking. Also does yogurt help with this? I've heard it does but i don't know for sure..