Sleepover +period=dis-tar (lol)help?

i am 11 i started my period 4 days ago my family was planing to stay at an others family house i got my period it hasent stoped yet but i am getting less blood this is my first period my mom said if u arent felling well with the cramps we an just not go my whole family was looking forward to this what should i doooo???????? should i go or stay home ahhhhhhh