Should i get baptized?

ok so i dont know if i should or not, yesterday i left my moms house and came to my dads because i couldnt take it anymore at my moms. my mom is a pcp addict and my stepdad is a alcoholic. theres always arguing and fighting at that house. they bring friends whoh drin and sniff cocaine all night till sunrise. and one day my mom came home all high so i got tired of it and left. i took the train to my dads and now im here. but catacism starts on wendesday. i dont want to go back there but my moms now threatening me that shes going to get the cops to go pick me up because she still has "custody" of me until im 18 when really in illinois law 17 is already an adult. and plus i told her that i already been baptized from when i used to go to sunday school when i was young, (now im 17) it was a cristian church i believe. so why should i get baptized just to have a ceremony and everything else? baptizing is baptizing. i could just repent. i mean they act like im dying in the next year that i cant just get baptized later in life. i dont sin. im a good kid.