I just quit my job what should i do next?

I have had a job for 3yrs 2wks ago and i quit today...i told my manager that i would stay for 2wks and leave but she said give me your key and go! so i left. I have had a vacation planned for the past year that i go on in 1mth and tried to hold out until then but it just got completely out of hand so i quit. I want to start looking for a new job but i don't want to go to an interview and be like oh yea by the way im going away for 2wks so should i just wait until im back from vacation or start now and explain about it....also everybodys telling me that "walking" out is going to look bad...i personally didn't walk out i was going to stay 2wks but my manager told me to go...so should i be worried about it.