Hiding self harm scars in the locker room?

i have a gym class this semester. i normally would never talk about this, but i have self harm scars on my thighs. i have to change in the locker rooms, though. i'm already very self conscious of my body and this would be hard enough if i didn't have cuts, but now i need to worry about people seeing them. what should i do?
also, i know cutting is bad for me. i've been working on stopping. these are scars i've had for about a month, they're not new. please don't say that i should just stop, because the scars are still there.
plus, the school has said we can't change in the bathroom stalls.
i'm so stressed about this. thank you in advance.
Hiding self harm scars in the locker room?
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