Back In August I Slammed My Foot Down, And Injured

Back in August I slammed my foot down, and injured it. I never went to see a Dr due to no insurance. It originally started hurting in the fatty tissue on the surrounding area around the heel of my foot, and now hurts in a different spot of the same foot. I feel a lot of tightness in the muscles and sharp pain, especially if I have been standing or walking more than usual. I always think it will heal up cause it will decrease in pain at times. It always flares back up after walking or standing. Wondering if I need to see someone..? I mean it has been a long time.