Doctors can't force you to take anything you don't want to. They can give you tests and make a diagnosis and make a recommendation, but it's up to you if you want to follow those recommendations. If you have such a large family occurrence of depression, you might be developing it too, and it also sounds like you have some anxiety issues which might be involved in being afraid to go to the doctor. I would ask, what happened in your life emotionally or physically when this first started that was different than your usual life? Also know that when people say they "can't" do this or that is also an indication of a budding anxiety problem. Because, of course you can eat anything you want, and you know it. If you puke, you puke, it's really not a big deal. But you do need to know if you're puking because you've developed an irrational attitude toward food or because something is wrong with your heath.