[bts]

First, I don't play in tournaments, so you'd better take it with a grain of salt.

I, however, do appreciate your braveness to disclose your situation, which itself is likely to solve half of the problem, I believe.

Second, recognize and acknowledge the problem. Don't try to eliminate or supress it, which only makes it wrose. I would tell myself that I "feel more anxious about the shot and the outcome of the shot" before executing it. In other words, let it out. The problem tends to solve itself by being witnessed.

So, started with tee-off, blow it.