Skipped one cl period(40 min) how do i tell my parents?

ok so the other day i wasnt feeling good, i was an emotional wreck, i looked like crap and i wasnt thinking. i skipped 40 minutes of my 7th period cl and slipped away to be in the bathroom, the school called i and i told my dad some lame excuse, and the next day the school called and didnt want me to go to skool, he said i took care of it, which i told him... i made up this not and scanned my moms signiture onto the note, it looks legite, but i think i might get in trouble, i don t know what to do.... should i tell my parents before the lie spirals out of control or should i just wait and see if the note makes it through the sysytem? i have no idea wat to do.... by the way i got iss once this year for talking back to a teacher who discriminated me all year, and i just spoke my opinion... and my dad said if i ever made one slip up, or didnt do my chores the right way or got bad grades in school, i'll hav to move accross the whole country to live with him. i cant bear that..... my dad can be violent not bad but he can scream his lungs out and take everything away from me. how can i even begin to tell my mom this?????