My father used to sometimes wear mismatched socks out in public, and when told by someone about them, would reply ”Yes, I know. I have another pair exactly like these at home!"
I choose to wear mismatched socks, because I see no reason to wear matched pairs.
I have never had a problem with socks disappearing, nor not upset because I cant find a match.
Life is a lot easier that way, perhaps try it.
It may be better than Valium!