Why does my pregnant dog keep following me around?

shes due very soon and has a nice quiet room prepared for her upstairs,but when i leave her to it she looks at me as if she wants to go toilet so i let her down and she doesnt go,she keeps treading on my toes due to being so close to me,last pregnancy she never did follow me about.any ideas why? and yes she will be getting spayed after this litter before anybody tells me to get her 'fixed'