OMG WORST STOMACH CRAMPS EVER!help?

ohkay so i got my period yesterday and it hurts so bad im having horble cramps on and off like sometimes i cant move and i feel like barfing up it hurts so bad i start crying im home alone and we dont have any pills for this becuase i live with my gma my mom comes by every once and a while but she keeps her stuff hidden and idk how to take it anyway. what do i do and im too scared to use a tampon and well idk im only 12!!