Heback

Hey, I've been on LTD for about two years due to mental illness & chronic pain. I had done multiple surgeries to treat endometrial cancer, which has left me disabled from work. My psychiatrist had helped me out with the medical questionnaire since my physician was reluctant to doing so. But I received a letter from my insurer saying that they need my physician to fill out a questionnaire for them; if not, they would cut off my benefits. Later, I asked them to send the forms to my doctor; however, I didn't follow up on that. Now they have been withholding my claim for three months. Do I have any legal recourse here? I've thought of contacting an ltd lawyer, suggested by my psychiatrist. Any advice is greatly appreciated! Thanks!