Chronic upper back pain, mental problems

I am having chronic back pain for 1 year. I am going through so tough stage of my life. I am not feeling happy regardless of what I am doing. I am feeling very fatigue, irritated, anger. Sometimes when i go out which mostly i dont do nowadays, i am feeling like people are noticing me or murmering about me which even though not making me scary but effecting my confidence so badly. I am having so much thoughts about suicidal ideas and whenever i am day dreaming, It will be about suiciding. But which I am sure for now that I will never do. Couple of months ago, in my old apartment i was feeling a so bad pungent smell which was not felt by anyone whom i reffered to. It remained even after cleaning the entire apartment so clean. I still can't believe that it was mot real. It took me to a situation where I am unable to realize a smell is real or fake while i am feeling one. I am hearing my own thoughts so louder inside my head whkch is irritating me a lot.