From your first post, you stated that you're fine on the range when chipping and pitching, and that it may be mental.
Yes, it does sound like you need a new mental approach. I did.
What happens to you, happens to me, and I follow the quickie chipping and pitching vids mentioned here.
Tension, anticipation, expectation ... all mess with your mind and then your body.
Save the technical swing stuff for the house or the range.
When playing golf, you need to...