Have your draw length measured by a pro who knows what proper form looks like. Your bow arm should NOT be locked out, but should be SLIGHTLY bent. When at full draw and anchored your body should form a perfect "T" shape with the shaft parallel in all dimensions with an imaginary line drawn from your bow hand to the tip of your elbow on your draw hand. Sounds like you may have been bit by the speed bug and like so many other archers opt for a too long draw length. To give you an idea, I'm just a touch short of 6'4" tall and with a short release and d-loop, I have a 29" draw length. Minus the d-loop and shooting fingers I MIGHT be able to go to 30". I've shot bows at 30" with a release and like you my accuracy goes down the toilet right after my form.

Another thing you can (and should) do is have your grip only in the meaty portion of your thumb and turn your bow hand away from the riser at a relaxed 45 degree angle with your fingers in a natural relaxed bend where your index finger only lightly touches the riser, if at all. You will notice that when you turn your hand out your forearm also turns away from the bow. Like you, I used to be overbowed because I INSISTED that I MUST have a 30" draw and had p***-poor form, and every time I shot I'd have a nasty case of road-rash from string slap. Then I ran into a bow tech that knew what he was doing and he convinced me that I needed a shorter draw length. He set up a bow at 30" and another at 29" and had me draw both while watching my form and coaching my form. I instantly saw how much one measly inch can screw up ones form. I had my Allegiance set up at 29" and I've never shot better. I gladly traded 10-15fps of speed for much better accuracy. Inside 30 yards, 15fps is meaningless when your bow is still making 275+ fps (in my bows case, likely a shade over 300fps), as long as my arrow connects with the vitals like it ought to. A 225fps double-lung aorta shot is far deadlier than a 325fps hit to the guts because you're overbowed and your form sucks.

Get thee to a bow shop! [8D]

Mike