Any way to calm my nerves about showering with the guys in athletics?

I am in 8th grade and track season is coming up. Its 1st period of the day and we have track practice for 1hr and 15mins. Then we get 15mins to shower,dress, and get ready for next period. The showers are not divided, its one big shower with different heads. And its required that we shower, unless you wanna stink all day. And I'm not circised, so I am freaking out that everybody will make fun of me. And people think I'm gay, and if I take a shower I will be more made fun of. HELP PLEASE!!!!!!!! ADVICE MUCH APPRECIATED