Am I making wrong decisions?

Ok, I'm 17 years old, almost 18, I've been a dishwasher for about 10 months and today, I decided I'll leave my job and go on a trip to British Columbia and then go down to California(I'm from Québec, Canada) with a friend(that had already planned everything, I just joined in). The problem : I'm supposed to tell them 2 weeks before I leave, but the departure is in 12 days, should I risk having a bad reference on my CV(only job I ever kept so long) for this trip?

I haven't worked long enough but I do know the boss would like to know before you leave so they can find a replacement. Even tho it's not 2 weeks it best to still tell them.