Shooting is a sport, enjoy it. You must of course be possessed with the presence of mind to accept some bad with the good. Gut if you are relaxed enough and can be tranquil through all adversity, to produce the precise exacting conditions for the release of one shot, this then is the course of action you must force yourself to adhere to in order to rectify this state of affairs. A method of inducing relaxation is all you need to minimise tension effects. In tension, adrenaline bleeds into the bloodstream, the liver steps up its sugar release to the muscular system and all your senses go into A1 readiness.
Digestion slows down, breathing becomes shallower and blood pressure increases.
We all experience tension, and when the problem that has caused it is solved, everything returns to normal - although slowly in some cases. Literally take a breather - breath deeply, three or four repetitions should be sufficient, and when you have finished, you should feel much more relaxed. By breathing deeply, you break the tension of your voluntary breathing tract causing the lungs and heart to relax as well. Separate your mind from your body, and from any tension hazards. Think of anything but the reason for your tension - this is harder to do than you realise, but once you have mastered it you will find that your tension will drop away quite easily.