My big toe toenail completely fell off and I did not notice it until I took a shower and was drying my feet approximately 7 or 8 hours later. I found the nail on the floor and thought it was someone elses and that they had cut their toenails and dropped it. I tossed it in the garbage. Shortly after finding it I went about my errands and there was some pain earlier in the day but I thought nothing of it because sneakers sometimes make my feet hurt and I have had calsium deposits on both feet removed over 15 years ago but I think maybe they are coming back because the outside of my feet will swell and then they are fine after a day or so. Up until the last 7 years I seldom wore sneakers except on weekends. I would usually wear 3 to 5 in heels. Should I see my doctor or should I be concerned?