Ok this might be the weirdest question ever but i have to ask it cuz its a emergency ok here i go..?

ok so im close to getting my period and im going to have a hard time changing pads in school because we have a locker section for our homeroom and the pads r in my bag and i have a boy next to me under me and beside me!!! i mean if i hide it in my jacket how will i put my bag back in it will just fall out of my jacket and i'll get embarresed! plz any sneaky ways? plz plz?