Wish I knew what was wrong

My foot hurts. Specifically my left foot hurts on the inside of the heel, it's almost the Achilles tendon but not quite.

Right there where that black circle is. Now I know exactly what tendon it is. It is very painful. It only hurts when I do a certain workout - which I did last night. I haven't been doing that workout because it made my foot hurt. The pain went away and I thought I'd give it a try. Now this morning I'm in pain. I don't know what to do about this. Is it my shoes? The floor at the gym? Some biomechanical thing? I just don't know and it's really starting to annoy me. Maybe I should take something? Would hgh releasers work? I've heard they help a lot of ailments.... I just don't know what to do. The worse part is I can not run like this and the shoes don't seem to help much. Actually, I just had a thought as I was typing this... Maybe if I ran on soft surfaces like grass. I may give that a try. This morning is strength training but I may stop and try a run on some grass in the district park afterwards. Hmmm....maybe