When I urinated and ejaculated I had a burning feeling and I started drinking a lot of water and my urge to urinate went away and my burning while urinating went away. Is it a coincidence, or what ?
The only reason why it burned when you urinated is because you ejaculated and the semen just passed through the penal canal. I'm pretty sure you don't have an infection. The best way to hydrate your body if you dehydrated though is to drink warmer water closer to your body temperature or if you don't like that swirl the water around in your mouth to cool it off. The body loves things its own temperature.