Replying to Boot Problems

My left foot is a size smaller than my right foot. So when I got new boots this year they gave me a half size up from my left foot which was a half size down for my right foot. I got the dalbello voodoos and my friend got them but returned them right away because he had really bad shin bang. Now My shins have been hurting really bad and they hurt just when I walk in my boots and not because my shins are tender. It is also a lot worse on my right leg which is the side of my bigger foot. Now I am wondering if it's shin bang or just if the boots are to small.