I have had the unfortunate and hellish experience of withdrawls from hydrocodone and xanax. The xanax was by far the worst for me mentally. I would have the worst anxiety and feeling of gloom and thought I was losing it. I was put on remeron and it helped with the anxiety and helped my sleep tremendously. I know exactly what your are describing I have been there more than once. Please do not take any more benzos. In my experience it just prolongs things. I thought I was doomed but trust me It will get better. It will start getting a little better everyday. You have to hang in there and do what you can to get by. Try benadryl,valerian root,hot tea,and ask your doctor about the remeron. It is an anti-depressant. I have been on it for 3yrs and it has helped me alot. I tried about every other anti-dep. before this and they didn't help me. I think they made things worse but this one finally helped. It helps with sleep immediately it doesn't take weeks like most others. It is fast acting. I hope I helped a little bit. Good luck and hang in there.