With so many YORKIES that do not have home and are currently in rescue I would like to say please consider giving a homeless Yorkie a home instead of breeding. Many people get in over their heads not knowing what to expect having a litter of puppies. If you purchased a puppy from a BYB and your daughters puppy is also from a BYB and they have a few litters that are not show standard now you have say 10 or 12 more cute little Yorkies adding to the population that is getting further from the standard.

So then the puppies have puppies because their owners want to spread around a few little cut Yorkie puppies too and now that number multiplies. Getting even further from the standard. Not to mention that you have not said anything about testing for genetic defects etc. prior to letting your cute little pups breed.
I have Pebbles who is an AKC Yorkie from a BYB. She's adorable and 11 lbs

of Yorkie love. She runs and plays and has a grand old time with my 2 rescues male yorkie/maltese Morkies. But she is not breed standard and Morkies are not hybrids they are a mix. They would make
adorable puppies but I would never consider allowing that to happen. They have been spayed and neutered. Then I also have my little man Truman who is my foster pup and he is a Yorkipoo. He could easily be the poster child for spay/neuter.
I have to agree, Yorkies
are like potato chips but that doesn't make is OK to have litters of puppies for your friends and family. If you really want to make something to give away consider baking cookies.
There are plenty of Yorkies in rescue and depending were you live they are also found in shelters. Why take a chance of breeding the little ones you have when there are so many already in need of loving homes. What
if you did decide to breed and something happened to the mom or one of the puppies? The rescue that I volunteer with just had one a Maltese mix from a mill turn over not only did the mom need a cseciton, but 2 of the puppies died after birth. This is common and heartbreaking.
*Please do not take this the wrong way* You said that you have anxiety and depression and watching your puppies make you happy which is wonderful! I wouldn't think that having the additional burden of worry from having a litter or two and the possible complications involved would be a positive thing in your life. If something did happen their would be no one to blame except yourself. Are you
willing and able to take on that burned? I know I wouldn't want to carry that with me. NO WAY! NO HOW! But I can tell you that watching a rescue flourish and grow have made my life so much more enlightened. I would bet that if you tried it, it would have the same effect on you. It is a truly wonderful feeling to see and feel that love.
So in conclusion BYBer are something that I personally do not condone. There are way too many animals in this world and it is selfish to feel that this is your right to breed~because you want to.