Excited and terrified

I recently told my boss that I was leaving my job. I am retiring from government service after 31 years and continuing employment as an independent contractor at home.

I am terrified and excited all at once. The excitement part I can handle. The terrified part is leading to some anxiety. I self-coach on this, I talk to my husband, but it keeps coming back. I really haven’t experienced anxiety like this before and I’m not sure what to do with it. I feel it in my body and it scares me. Any insight on getting past this is appreciated.