[B]okay I have pinworms I know for sure no doubt.I don't have a mom to tell ,my sis thinks I have my period can I get my first period if I have pinworms and what do I tell my sis? Ps I`m 12 now so I don't know if this is normal. And is there a way to get rid of them without a doctor I need help pleaseee:o

No, there's really no way to get rid of them without medication. You're going to have to tell someone -- a school nurse, perhaps? A guardian?