Replying to Ankle and shin pain

I got full tilts a few weeks ago and yes I went to a bootfitter, anyway he put me in 28.5s. They feel pretty good walking around and stuff, but when i start skiing and doing jumps and what not, they begin to bother my shin a little (not shinbang but almost like there is something in the boot poking my shins) but mostly my freakin ankles start killing me. I mean my ankles hurt to the point where at the end of the day im limping....these are still pretty new boots but like what should i do?