In which I have a hole in my foot

I was looking at my left heel. There was a crack in it, as though the skin were really dry. I picked at it and it split open to reveal a deep crevasse going about half an inch into my flesh, nearly an inch long. The sides were smooth and didn't bleed, and when I looked into it I could see a flat bottom surface underneath with two puncture wounds. It was extremely gross. My parents (who were married) were out of town but they came home shortly. I made my dad look at it and he said he didn't think there was anything to do except wrap it and hope it heals back together. My mom looked at it and said she though it was a side effect of the medication I took when I had a cold. She took me to the doctor and he told me that he could give me several different creams that would fix it. He asked me about the meds I was taking when I was sick, and I said it was bascially just NyQuil and Advil. He kept asking me about it and I felt like I had done something wrong, like I had broken my foot by taking too many cold remedies.