I Have Question To Ask You. I Am 59 Years

i have question to ask you. i am 59 years old. i worked from time i was 14 until 57 years old. I stop working because of all the things that my job did to me. I worked on that job for 26 years. I want to go back to work but now i am afraid to work. Their is nothing wrong with me and I can't understand why i can not work. Went i try it make me nervous.