My baby is in his 12th week and he only poops once a day and pees twice...I am not sure if this is normal but I took him to vet on Monday and he says he is very healthy...I guess each Yorkie has a different metabolism and digestion...You might want to check with a vet....
PS: I also have a BF who thinks that I am too crazy and over protective of my baby...I understand how you feel 100%...