We can ONLY discuss photos that have prints, so of course I have deleted your last photo.
Also, DO NOT MENTION YOUR PHONE AGAIN, or I am walking away from this conversation. Is that clear?
Chana, I fear you're overcomplicating this.
Your screen must match your prints. It's that simple. If your screen is presently brighter than your prints, the brightness needs to go lower.
Can we come back to that a bit later? For now, we must concentrate entirely on getting a match between your photos in Photoshop, and the prints in your hand.
Is this the first time this has happened? How often do you get prints?
Chana, its 7:40am on Monday here. I'm running around making lunches and trying to get my kids ready for school. I'm answering your questions as promptly as I can, but I beg you grant me a little patience.
No, leave the moon (contrast) exactly where it is.
Keep the brightness going down. The result should be somewhere between 80 and 100. Some people have to take their screen's brightness to 10% or even lower.
Is this the monitor you have? https://downloads.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-u2419h-monitor_user's-guide_en-us.pdf
Oh, sorry, on a Mac it's in a different menu. I can't remember what it's called, but it'll be there somewhere.
Show me a screenshot of your available menus if you can't find it.