I am so confused..
I am trying to move on from my ex, but is it wrong of my to be making out with three different guys in the fast week?

Kind of. But also not really, in the end ask yourself serously what would make you feel better. I highly doubt the answer is to "hook up" with as many people as possible. In my personal experience that will just make you feel worst. I usually find when getting over a break up, that is the time to spend on bettering yourself, maybe time to start doing the things that you really wanted to do but never got around to.