definitely play it slower natalie, and also work on your left hand. it's clear from what you write that you know the right hand part better than your left hand part. try doing variations with your left hand - 4notes fast, 4note slow, alternating.. or 2 fast, 2 slow.. or dotted rhythm. do that until you're perfectly certain in your left hand. then, try them together. by bringing both hands to the same level, your right hand and left hand should play at the same speed. good luck !
--selly