I have worked for my employer going on 6 years in August. I am 48 years old. The workplace is a cesspool of negativity and I feel that I have been targeted and harassed. The environment that I have worked under is poisonous and not conducive for a positive, productive workplace. I have been through three different investigations based on allegations that were all unfounded and most recently went through an investigation that my direct supervisor called a 'witchhunt'. The results of this investigation were substantiated, however, I vehemently deny what was brought forward. There are also circumstances with the way the investigation occurred that leave me feeling that there was no way I would be exonerated. I have been off work on a medical leave due to mental health since October 2017. I've recently met with my direct supervisor 'off the record' to discuss next steps. During this meeting I was told the findings of the most recent investigation, that she has a hard time believing it went the way it did and that she will need to bring the findings forward which would result in me being terminated. She wants to advocate for me, however, and said she would speak with the CEO and attempt to try and get some severance for me if I resign vs being terminated. What is my best move?