as AwakeTooLong asked, do you mean otherkin, or you can actually transform when the moon is full. do the mythical creatures most think when you say 'werewolf' or 'vampire' physically exist? no they do not. humans with certain attributes like psi vampires and otherkin, yes. you are human though, nothing will ever change that.
in regards to your profile, [which i read] "Every night i feel stronger" good for you, could be in your head, but i have friends who draw strength from the moon. they don't transform or consider themselves werewolves though. secondly [the one i took more insult with] "I'm capible [capable] of much more than most 13 year olds. Piss me off and I'll jinx you." while age to me does not determine a persons worth, strength, or abilities, because everyone's different and excel at different rates in different fields, i do take qualm in your line "piss me off and i'll jinx you" not because i fear the repercussions but because that's an extremely immature response. the first sentence you ask to be treated with respect, the next you throw a childish threat. [the rest is just spam reposted by a lot of younger folk on this site.]
back to the topic at hand though, there's plenty of creature who walk the earth; animals, birds, fish, so on. claiming mythical creatures do, please provide proof. these beings are astral, they're real, but of another plane. many don't come here unless summoned, and even then they don't appear as full physical beings. they are similar to spirits in the physical. research these topics of 'magical beings' before drawing conclusions. the world is vast, and new species are discovered pretty much daily, do i believe these things don't exits physically? i hold out a small sliver of hope [like 1%] but i know humans cannot change into them, magick doesn't work that way. you can be born otherkin, but a human cannot be born a werewolf. i know this will probably upset you, but it's true. research all possible conclusions for your symptoms before jumping to 'i'm a werewolf'.