Well, the good news is that you are hitting towards the heel not the toe. Lots of golfers seem to struggle with shots off the toe.
1. Weight is shifting to your toes when you are swinging.
2. You are swinging too far to the outside when you are coming into the ball.
3. Your arms are swinging around your body (like a baseball swing) too much.
4. Your posture is collapsing in your downswing.
Of course, I have no idea.
If you could...