With apologies to REM: "what's the frequency Kenneth?"
Do you know how far you hit your clubs? You'll gain confidence the moment you do.
Don't figure this out on the course, instead, borrow or buy a yardage scope and take it to the range with you.
Go to a range where you're not hitting off mats, and take your 7 iron. Hit 10 shots and gauge the distance...take the average.
Ok, now go through the rest of your practice without measuring.
When you have 10 balls left in your bucket, take that 7 iron out again. Gauge the distance of each landing and take the average.
Was there a difference in the two averages? If so, you have a range. If not, you're dialed in.
Your goal is to be dialed in for each club in your bag. Until you get there, use the yardage that you got from your 7 iron as the standard, and add or subtract 10 yards on each club.
Thanks for reading, keep it in the short grass.