I start school again in one week and I have a big problem… 17 M

So I’m on the cross country team and out practices started roughly two weeks ago. Since I barely ran over the summer I was somewhat out of shape and would stop a few times during our first two runs. (One run each practice.) Every practice my goal is to complete the run no matter the distance without stopping. On day three however, it was hot as fuck, so I took my shirt off then ran four miles without stopping, for the first time of the season. I felt accomplished until I got water inside the school, and exhausted because of the heat I was sweating everywhere. Then I noticed there was a stain around my crouch area it wasn’t big or small. 

I guess it really was a hot day. I don’t think I pissed myself, I didn’t have the urge to use the bathroom while running or even after the run. But also I don’t think it’s common to sweat in that area, after all I’m a teenage boy. I was immediately embarrassed even though I don’t think anyone saw it at the time. Then when we go to stretch after our run, us seniors make a smaller circle in the middle while the rest make a circle around us. Right across from me is this girl, about maybe 15 years away. She’s my next door neighbor, we used to be close back in elementary school, then her parents divorced. She sat along with three of her friends on the team. I think she thinks I’m kind of weird probably because I’m very quiet and a bit antisocial. It was super awkward, during the stretches I was doing whatever I could to hide that area, and some stretches it really hard to do. What made it even more uncomfortable was that she and her friends were laughing about something basically the whole time. That practice sucked, we also did a bunch of dumb social activities too, I just wanted to get the fuck out of there. 

The next few days I was just being confident that they didn’t see it and if they did they would forget, then about a week later my anxiety gets really bad about the whole thing, what if my crush knows about it? She’s completely flawless, she’s cute and her physical appearance is perfect, we have a lot in common too, like we both have a twin brother. (No I haven’t told my hot her about this.) My neighbor and her friends are popular but are not super popular like my crush’s friend group is. However I have occasionally seen them talk to each other in a circle in the hallways, me and my friends also talk in that area too and im just afraid that they might see me and talk about what happened. She may be out of my league but I wanna finish high school at least knowing I had some sort of possible chance with her, if I really tried. 

The worst part is I have no idea if they saw it or not and if they’re gonna tell people about it. I’m terrified that this rumor is gonna spread around our grade specifically the popular girls that I pissed myself during a cross country practice. Personally if I saw that I wouldn’t tell anyone about it, but popular girls are a different breed. I was actually excited for school to start, now I don’t know what to do.