over training

hey, i just wanted to ask everyone for their experience with over training and recovery. i've put my whole heart into swimming since freshman year in high school (im a senior now), and trained as hard as i could since the spring of freshman year. at first i just swam the same practice everyday....then i started doing a lot of dryland, running, biking, and changed up my practices to faster intervals, and different strokes. i never rested, until i realized that i get faster when i rest/taper. i realized this the summer between my sophmore and junior year. by then , however, it was too late. i broke my body down so much, that it would take a long time for me to recover. when highschool swimming started up again my junior year, i was so broken down, that i was swimming even slower than before my freshman year. i've been battling my coach trying to convince him to let me rest, and understand my situation, and he finally did. this year, my senior year, im trying to feel strong in the water again. im posting this on the forum to ask you guys if u know anyone who seemed like a slow swimmer for a while, then had one year where they suddenly started breaking records like crazy. i hope im not crazy, but i really think that with my body, if i get it back to full strength, i could pull off some crazy fast times. now, with this broken down body i can go a 1:10 in the 100 yard ***...and i haven't dropped anytime since my freshman year. this entire time i've been getting in so much better shape, yet dropping no time. therefore i think once i taper, i will drop 10 seconds at least....am i crazy? or does what i think make some what sense....according to my situation.