I understand how you feel. I was the same when I first got my baby and he was 5 pounds at 12 weeks. My hubby and his brothers who comes over quite often thought I over protect him too until one day he started sneezing because he caught a mild cold, I said to them that they were too rough with him, that is why he is wheezing
They at least respected me when I repeat what I want them to do and not do over and over again like a grandma chanting and I never left them alone with my puppy. It is their first time of having a puppy in the family and one that is so small so I keep watch all the time. At the end of the day, if anything happens to your baby, you have to be responsible. Hold your puppy, sit your family down and explain to them about small dogs especially one that is 2lb. Better still, give them a book to read about Yorkies so that they will understand more about this breed. Maybe they are just being excited of a newcomer in your family and everyone loves puppy. Whatever other people say, don't take it to heart too much as it was the same at the beginning for me but when each time he is sick, I am the only one who sleeps with him in the couch and stays up all night taking care of him so I am rather stern in my ways now. I don't even let my baby go out now because it is -10 here today and until he is older, I am not taking the risk. He is just on the way of recovery from worms and that is my fault for bringing him to the park which I will also wait until he is older. I also do not let him play with other dogs, only the ones I trusted.My family is pretty understanding. They now call my baby a wimpy dog. I don't care as long as they follow the rules. Best of all, my hubby loves my wimpy little dog now
Don't worry about it, try to talk to them; explain and explain, repeat and repeat like a grandma because that bores them and they will listen
Try not to lose your temper in front of them and then after that, come vent in YT