breast feeding moms, i didnt breast feed for 4 days cause i had went drinking with friends and now…

breast feeding moms, i didnt breast feed for 4 days cause i had went drinking with friends and now my breast milk isnt coming in i dont know how to restart it up again. after i drank beer it was leaking alot the next night. not sure if i should drink again or what to do to start getting my milk started again. any advice?