Transgender Support Group
This community is here to support and help the large population of transgender people. If you or anyone you know identify as transgender, this is the place to share your feelings and experiences and speak with others who are going through similar things in their lives.

if they laugh or disrespect you, i mean.. that's harder to answer. i would refer to them with the wrong names and pronouns until it clicked in their brains how dumb they are (i don't advise that though lol). you could just ignore them, you could tell them off, tell a teacher, get their parents involved, etc.
i think if everyone else is treating you well though, that the chances are those guys will too. even if they're dicks at first, if no one is backing them up, they'll stfu sooner.
i'm really sorry if this isn't helpful, as i'm actually not out to anyone irl and i'm not positive about how to handle this situation really.