YOU DESERVE ANOTHER DOCTOR. This MD is causing you harm. You are not improving. You are not receiving adequete care. He is doing a disservice to you and you in turn are doing a bad deed to yourself--you could feel so much better with more knowledge, more attention, more advice.
If you love yourself and life, get a new doctor. When you start considering suicide and life is misery and painful, that's when it's beyond overdue.
Please--see a new doctor. You are worth it, you are worthy. You are lovable and capable and life is not only about suffering.