How to tell my brother i started my period?

hey i stated my period i live with my brother because my parents passed we haven't talked about this but he a nurse . im thing about hiding it should i. i been using my mom ld pads and i Been using toilet paper and hiding it i think im going to by my on pads/tampons with my money. so what should i do if i should tell him how i got it yesterday and i still haven't told him because he was at work to day the nurse said i could come in any time to get stuff because of my situation so she made it easier to hide it and in the summer i can by my own stuff so im Really thanking about hiding it the Mr. Helicon (the school Nurse) said he would tell him if i wanted but i think it better if id it right and don't know if i want hem to know. my brother has a girlfriend and i not telling her to tell him and she doesn't have pied stuff here