Does a heel spur feel like a stone bruise, and if you draw your toes back can you feel it in your heel also?
Its is probably more likely that you have something called plantar fasciitis. This refers to inflammation of the tendon which stretches from the heel to the toes and is the most common cause of heel pain. When you flex your toes upwards you often experience heel pain with plantar fasciitis. It can occur with a heel spur; a heel spur is simply a reaction to inflammation which can, of course, be caused by plantar fasciitis.
For more on plantar fasciitis see http://www.healthcentral.com/diet-exercise/h/best-treatment-for-plantar-fasciitis.html