I stepped on foot ysday and ever since have shooting pains in my foot that are not getting better they come and go come more then go... help?

Where oh Where. Your description makes a pretty good case for the possibility of a foreign body in the sole of your foot. It could have been there already and you stepping just moved it into a hurtful position. Having said that, you did not say exactly where in the foot the shooting pains are.
Where is pain? Need more information. Could be as simple as plantar fasciitis or a nerve injury. Give more descriptive info: quality of pain (ie: sharp, burning, throbbing)