In addition to all that has been stated, especially getting quality 1 on 1 instruction.
Make sure your vision is up to snuff re current vision Rx.
Use ear plugs under a set of ear muffs which may help report/flinch/perceived over pressure etc.
Strive to use all available time at each shooting position. Tom Givens first told me that many shoot too slow up close not earning points at all and shooting too fast at distance dropping points.
I fully concur with Duke that a lot of this is in your head.