Over the winter holidays we left our 7 month old yellow lab at a kenneling facility in our area. We left her for two days one week and then 2 days again the next week. Upon bringing her home today, we immediately let her out in the yard to do her business as usual, whenever we come home from somewhere. She ran into the yard then back to the door. About ten minutes later my 2 year old son tells us "penny pooped!" There was poop all over the kitchen floor. Not even as a puppy in the house breaking process did she poop in the house. Later today she had two other urine accidents. She seems very skiddish, almost like she doesn't trust us today. Do I need to rehouse break my dog and how do I help her regain her confidence in us when we go back to work as usual, instead of being home over the holidays?

A lot of dogs don't handle being in boarding kennels very well.
I think it's just a case of regaining her trust and letting her settle back down at home.
Definitely have a toilet routine and take her outside regularly, even if you need to take her out on a leash at first to make sure she goes outside.