2 days after I reported a co-worker harassing me for the 2nd time. (she continually makes demeaning remarks about me in front of other co-workers) I was called to a meeting with my manager & HR. They presented me with a letter stating that my performance had been unacceptable for a long time and that I had 30 days to improve or be let go. I have always had great reviews (most recent 2 months ago) I meet all deadlines, never take time off, and recently received 2 bonuses along with "kudos" emails. The timing of this seems VERY suspiscious to me and everyone who knows my work ethic. I plan to ask for specific details for their accusations and I have all documents confirming the opposite of their claims. I'm in such shock I feel sick. I'm 56 years old & need to find a new job? What can I do?