It's very difficult to say as we are not privy to your running form and what could be causing your issues as injuries have a wide range of causes from the running surface, to lack of adaptation from running to biomechanical issues. You may want to see if you can locate a running club or running coach who may be in a better position to guide you.
If you are a resident of the US or Canada, you can go to the RRCA.org
for a list of coaches and clubs.
I hope this helps!