@winterfairy2022 It's mostly fine, the only English improvements you could really make are tiny bits of incorrect grammar such as comma placement. Is the character named "Rock Concert Luna" or is the character Luna just going to a rock concert? I'm inclined to think that it is the latter because she says "you can tell mom that I got pregnant there" but we don't know where THERE is. if she was going to a rock concert, the better first line would be this:

"Damn, Luna!! You're not supposed to go out to rock concerts without underwear. What's going on with you?"