Newlywed on the brink of divorce?

My husband and I were just married this past year and already I'm finding out more and more about him that I'm really not happy with. I've caught him in many lies (none invlolving infidelities) and now have discovered a financial mess he's been hiding from me. I feel like I can't turn back now because we've made this commitment, but I'm stuck. I could really use some good advise on either how to get him to see the light on these matters or if I should just leave him.