Someone explain emotional numbness to me who has had it?

doctors say I have depression, but i'm having numerous physical symptoms and I'm not experiencing stress or depression the way I have in the past. I feel like i have to have a vitamin deficiencey, something serious, ect. My most worrisome symptom is Emotional numbness. nothing shocks, saddens or really angers me. I feel detached from my body. and it feels like its getting worse, so much that I can't sleep because I'm afraid i'll wake up not remembering anything. my head feels "full of air" Someone please tell me your story if you've experienced this.