Swimming unit in gym class?

So I'm self conscious.

I have a bikini and I'm for sure wearing it. But I'm pretty skinny but my gut awkwardly sticks out, and nervous people will talk about it. I have some friends in that class who all have AMAZING athletic bodies. And I have some guy friends in there one of them is kind of mean and I'm afraid he will say something (he is super stupid so he doesn't know what to say and what not to say). And my bikini bottoms are kind of small so it will be awkwardly . But there is nowhere to buy any others right now. And right now I have a phase of bad chest and kind of bad back acne. Can you guys help with advice for all of these things?
Swimming unit in gym class?
Post Opinion