sweatshop video'd me running to check gait etc and helped me choose shoes that were suitable for me .
also running shoes have an expiry , after , i think 500 miles (someone correct me if i'm wrong?) they should be replaced as prob do not support properly from wear and tear and general use, they can always be demoted to garden shoes/walking the dog rather than binned.
the aches could be down do the actual exercise epspec if you usually run shorter distances then try and push further and maybe overdo it?
hard to speculate really, deffo get some advice from a specialist footwear shop, even if you don't purchase immediately , they are so helpful.