How to hide tampons in middle school?

well i recently bought a pack of tampons thank god !!! i was tired of using toilet paper!!! any ways my friend said tampons were gross which really hurt my feelings because i use them. she said a lot of mean things like " your like loosing your virginity to a tampons and that its like " it hurt my feelings but i think she doesnt know i use them because i never told her what i use. anyways she uses pads . how do i hide them at school? should i put one in before school then during lunch? i have 3 periods after lunch and this is my first time taking them to school. also what if she says something abut the tampons? what should i say that wont hurt or friendship?