I used to play a very slight draw, but now I have a problem.

When I hit the ball, usally anything above 7 iron, It travels straight for a very short distance, and then travels directly left.

I was experimenting, and if I position my feet well left of the target, but have the clubface aimed at the target, I hit a perfectly straight shot towards the target- with no draw/hook/slice/face

Any Ideas?

Wonder if you had snuck into a closed stance without noticing. With the open stance and hand action through the ball you are working out the straightaway position and path for your hand action. Its a compensation for an issue that could do with helpful eyes instead of the band aide fix.

Is this what your saying? It is obviously a problem with my hands. When I open my stance up, my hands work the ball correctly, but with a normal stance, something is affecting my hand/wrist?

Your hands are rotating X amount. With an open stance the force vectors at work on the ball now have it going straighter. With a square stance the hand action is too much for the speed of the pivot.
So either speed the pivot train up or slow the hand rotation down.

Or try moving the ball position in your stance. It may have just sneaked too far forward if its a lazy draw starting form straightish. If its a wicked effort then its hands and pivot driven.