I want to know if there’s anything illegal about speaking up about what my employers did to me.

. I use to work for the printing department of a Staples store in NY. I was wrongfully terminated about a month ago. Before my termination i suffered harassment, verbal abuse, discrimination and worked in a very hostile environment. I spoke up about it to Hr but nothing was ever done. I was planning on suing the company but i get panic attacks everytime i have conversations with the attorneys about what happened so i decided to not continue with the lawsuit for my health. I still wanted my story to be heard because my reputation was tarnished so i wanted to expose to the employees that still work there of what the company did to me. Every store has its own email where they receive notices everyday and customers print request and all employees are obligated to read. To get to all employees I wanted use those emails as my platform and create an email with my story and send it out to all stores. Is there something illegal about this? Can the company take legal action against me for that?