It's easy to "Monday Morning Quarterback" your decisions as a Turkey hunter. This bird was coming, he answered pretty much all your calls. Real mature, experienced gobblers will come a certain distance without seeing a hen, then they get suspicious. When you backed off, he may have got weary, and it changed his approach. He kept moving, but seemed to skirt your location. It's happened to all of us. The only thing I can offer to you that has brought a "skiddish" Tom in is scratching leaves. He may have been waiting to hear the close range natural sound of his hen walking. I have had success with this. I always have a 3-4 foot branch laying right along side me just for this reason. You experienced what everyone of us have, you will learn and close the deal next time. Constant thinking about it will make you better.....be safe