Hi Nadine,
I had the same unpleasant experience through buying shoes online because the range is so limited in stores now. I have spent over $300 on 2 pairs of runners from the UK that have caused the fluid sack surrounding the tendons in my ankle to rupture two weeks out from a trail race and only 3 runs using the shoes. My physio said it was the shoes and to throw them away. Now my fitness has fallen and I still have a swollen ankle.
It pays to get the right shoe by trying them on first or like you say a sports podiatrist or a physio, it's cheaper in the long run.
