I have the same problem recently. What I have done is start my round with a cautious approach.
Instead of going to the practice range, I just warm up real good by hitting tees with not ball and stretching. Every now and then, I will hit the range but no more than 10-15 shots. being on the range makes me want to swing for the fences without focusing on accuracy and sometime causes bad habits. So I do just enough to get my muscles warm.
Then I go to the practice green to bring the heartrate and adrenaline down.
I tee off with an iron to put the ball in the fairway and get my coinfidence up. After that, everything mentally is ok. And I have found that good mental translates to good physical.
Good luck.