First, welcome to YT
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Second...it's okay if you've made a mistake - it really, truly is. It could be either there is most definitely something not right with these pups' past socialization...and/or you may just not be quite ready to handle a puppy...which is a TON of work, dedication, time, effort, learning, and patience.
Who is the breeder, where did you get these pups? Was there something off about the breeder / puppy situation w/ these 2..?
Do you want to give them up to a yorkie rescue or something...or what feels right at this time?