I used to have this problem alot worse than I do now.
Link to me posting the same Question 6 months ago
schroedy's advice in the thread is what helped me the most
Some things I've done to fix it are:
Realize the pot doesen't belong to me until I show the best hand at showdown or all of my opponets fold. I used to feel like I deserved the pot. Now I realize that my opponets should sometimes "rightfully" win the pot.
Quit caring so much. Realize in the scheme of things it matters very little if you win this pot or not. It's about the bottom line. The end of the month or year. Have fun. You are there to out think people.
Pause and think before EVERY large call. THis one thing has saved me thousands of dollars. Stoping the auto call because I am too anxious to think straight.
I'm sure there is more as this used to be a huge leak in my game and now it is a fairly small one.