1993 Nissan Sentra headlight problem

Here is one that has confused everyone I know. My car is not equiped with day time running lights. With that said, when I start my car, sometimes my headlights come on ( they are a bit dimmer than if I turned them on) and when the car warms up the left headlight goes out and the right headlight lights up brighter as if the highbeam was on. I turn my headlights on now everytime I drive. If I flash or turn on my high beams, the left light goes out and the right highbeam goes on. What throws another twist is, lately I have been setting my parking brake because I now live on an incline. If I start the car in the morning, the lights do not come on, but as soon as I release the e-brake, the lights go on. Please help troubleshoot this crazy problem. Thank you