Most definitely. I get periods where I'm "numb". The upside for me is, I can handle the periods of depression much better when I'm not feeling like I'm walking around with a knife stuck in my chest. The downside is, joy and happiness take an exit too. I can smile and laugh, and look pretty much normal unless you know me well, but the feelings won't correspond with the smile when I'm like that. To me, it feels like a protective mechanism. There are people who have been put into an "induced coma" for medical purposes, such as following a traumatic brain injury. It allows a chance to heal without being in a state of constant agony. I see emotional numbness much the same way. It allows for the passage of time, and for a bit of healing without being in a constant state of torturous pain.
If you do a search for "numbness", I'm sure you'll find a lot of posts about the subject, Anna. Seems pretty common.