tell you what bella does this. i have kinda an idea what it is, bella has a thing about pooing in my yard in the rain, and one time i got really mad at her because i let her out and she wouldnt poo but soon as i nipped out i come home and she has pooed in the house and i shouted and sent her upstairs...i would never hit her but ever since then i let her out and she starts shaking and then runs upstairs and shivers....i then would leave her for a few hours and when i came home she would stand at the top of the stairs and shiver and would not come near me

she would only perk up when my fiance came home then she was fine with me after that!
i have a feeling ive scared her and i cant get her to stop doing it! its really strange :s