Re: a pair of clothes? 14 pairs of clothes?
I would never say "a pair of clothes" or "14 clothes" or "14 pairs of clothes." That's really unnatural. "I got a pair of cute shirts at the store" "I got a great deal on a new pair of jeans." -- Just to make things confusing, "a pair of shirts" are two garments, while "a pair of jeans (trousers/pants)" is one garment.
I agree that "your clothes" means "whatever you are wearing" if a mother says "Take off those dirty clothes" but it can mean "whatever you own." "None of my clothes fit now that I've lost all that weight." A mother would say "those clothe" or "your clothes" not "the clothes."
If you had one item in the dryer, you would NOT say "The clothes are in the dryer." You'd say "Your shirt is in the dryer" or "Your dress is in the dryer" or "Your jeans are in the dryer" etc. If you say "Your clothes are in the dryer" it definitely means more than one garment.
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.