Does constantly getting a shock affect your body in a bad way?

My partner works late and comes in after i am asleep and every night he gives me a big fright. He doesn't mean too, but i lived on my own for years - just me and the kiddies i've got. Because of this i nearly freak out every night when his shadow comes in the room, or i hear him come in, i keep thinking i am about to be attacked because i am not used to a man coming in my house in the middle of the night. I can't help getting a shock because i am asleep and am not thinking. I just wake up and sometimes actually scream i am so shocked.. I know i sound a bit ridiculous but can this give me a heart prob or something if it keeps going on nearly everynight like it does? Any solutions to stop the craziness?