Why does my left testical hurt?

Everything that I looked up is just talking about STIs but the symptoms that were listed don’t relate to me . My balls arnt swelling, it doesnt hurt when I pee or ejaculate, I don’t have any lumps, and I don’t have any discharge. I recently moved to Georgia and it’s pretty cold here and I’m from Florida ( which is always hot. ) So my mother says “it’s just our bodies arnt used to the weather.” cause shes been having some aches herself. It’s only the left one , and the pain comes and goes . And on a scale from 1-10 it hurts maybe about a 3 . It doesn’t really hurt , it just feels like ; when you hold your pee for too long and once you finally go , you get that tingling feeling .