Assuming your bow is setup right, and your form is good, I shall continue.
Confidence is a big thing, so here are two things that may help with your shooting.
1) Pin size. Depending on the size of the target you are aiming at, the .019 pins may cover the target. This makes it hard to actually centre the pin on the target. I recently changed sights on my 3D bow, and went to .010 pins. I saw an immediate improvement in consistent accuracy.
2) Confidence. What size target are you aiming at? 1" dot, 5" dot or 10" dot? When I first started shooting from longer distances, I started with a 5" dot. As I practiced more, and the accuracy improved, I shrunk the dot size. Its the same principle as practicing at 60mtrs, to make a 40mtr shot easier. Get confident aiming at a 5" dot, then a 3" dot wont seem so hard. Get used to nailing a 3" dot, then a 1" dot is nowhere near as daunting.
Practice, practice and more practice will build confidence. Confidence goes a long way towards accuracy!
Leigh.