Ditto on the shoes. I hate to say it, but getting shoes 'fitted' isn't all it's cracked up to be. The best option, I have found, is to find an online running store that will allow test period and still let you return/exchange the shoes. (roadrunnersports and I think fit2run, for example). That way, you can order and test to your heart's content. Everyone is so different physiologically, 'conventional wisdom' on running shoes appears (to me) to be bunk.
Other than that, keep up the PT and possibly enhance that to every other day. (Are you doing that at home? What kind of foot pain?) If you can walk without pain, get as much time out there as you can, as that is still beneficial! Wrap your shin. Even an ace bandage may help if you get it on their snug (but not pulsating tight) and provide some compression. Last time I had shin splints threatening me, I think that made a difference keeping it from getting worse. And it felt good. (Wore it all day and night for a few days.)
Good luck! I know it seems time is closing in, but stay positive, fight!fight!fight!