Send along some photo's. The song chain in Off Topic is a good way to get your post count up. In the meantime, I wouldn't worry over much, it could be normal. Any chance this section of the hull was sitting on a boat stand or something before you got pounding around? And please take a look inside at the spot where it's soft and let us know what the construction of the boat looks like there. You'll probably want to pick up Don Casey's Complete Illustrated Guide to Sailboat Maintenance and start paging through it. It's about the best out there for the projects you're contemplating and worth every penny.
“Scientists are people who build the Brooklyn Bridge and then buy it.”
Wm. F. Buckley, Jr.