I went through a similar situation with my Lab but things got better...I got my dog Sasha when I was living with a boyfriend and we raised her for the first year of her life toghether and were able to be with her alot, then we broke up and I moved out taking my darling pup with me. She was confused because I got a roomate ( a new person to live wtih) and it was quite an adjustment. because I had to work more hours and my roomate was home Sasha didn't get to see me very much and was living with a stranger so to speak and she in a sense was upset with me. She ignored me, she would sleep in my roomates room and not greet me at the door when I came home. I was really worried that it was my fault....so heres what I did.......

When I was home I made it a point to go to her for the attention and take her out, letting her know she had all my undivided attention when I was there. I would invite her up on my bed any hours of the day not just at night and rub her belly or give her a chew toy while on the bed, to let her know that I wanted her on the bed and so that she could see it was somwhere she was welcome. Also when I first came home from work, if she wasnt at the door, which she wasnt, I would call her from the doorway and crouch down so I was at her level. She began to remember again that when I came home I wanted to see her first and foremost and would immediately grab her leash and take her out. After a lil while things are back to normal again and she is my partner in crime! She's at the door when I come home tail wagging wanting me to love on her and when its bedtime she sits right next to the bed till I get the covers situatuated and pat the bed for her to jump up and join me.

I know its scary and worries you, but just remember no matter what situation or life change a dog goes through, your their mommy and daddy and they will always give you uncondtional love no matter what. They just have mood swings and thier own ways of telling you that they might not like the changes that happend and are taking thier own time and way to deal with that change. They will come around. Just put a little extra sugar on the love you give em'