Shave the hair off your knuckles ....to give yourself another 1/8" of clearance...( or your nose ) ...or both...
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Wow ....../ I think you're pretty deep into the weeds too on this one ....
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But part of where I think you're making a mistake is "moving your head"...you don't want to move your head / you want to shift your eyes, without moving your head.
But first things first...get the adjustable comb set / on or off cast - and height --- so the gun shoots where you look ( full choke / shoot at a 3" dot at 21 yds ).....and make sure / shoot 3 or 4 shells.../ rest a few minutes -- do it again ..../ make adjustments / do it again ..../ and make sure you're length of pull at 14 3/8" ...or 14 1/2" ...or whatever you need gives you the clearance you need so you're not bumping your thumb on the gun...as it recoils ( or its too short )...
Once the gun is set ....then go back to the fundamentals...( and quit moving your head )...