It might be something medical, something which is making you very sensitive to the road condition that normally people dont notice....
or it might be very psychological...probably during your pregnancy you felt it due to hormone and all, and you hated it then...and it kinda remained in your subconscious mind. So everytime you drive through that place, subconscious kicks in.
Again, I'm just taking a guess here. But you shouldnt leave it up to guess...get it checked by doctor...you cant imagine how many people ignore small symptoms thinking it's silly just to find out later it became something serious...i though hope it's not that in your case
lease: