Can I still run with a heel spur

Ok so heres the story back in SEPT I had a horrible heel spur like the size of a lg marble. the Dr did a shot in the foot and 3 weeks later I was good. SO in Nov I started running have worked my way up to 6miles. On Friday I decided to try insanity and got horrible calf pain and stiffness, stupid me went ahead the next morning even thou in pain on a 3mile speed run ,well just as I hit the 3miles mark It felt like a rock appeared in my heel. Just went to the DR and he said the spur is inflamed again. Can I still run? If so should I switch to a new shoe or something? I already wear super feet all day for everything else. For running I have saconys and was fitted for them at sole to soul