Hi Kim
Do yourself a favor and get the book "Hope and Help For Your Nerves" by Claire Weekes. It is the best I have found to explain so you can understand what you are feeling and why. She is also great to give you coping skills and understanding about what is happening to you.
That feeling of unreality is called depersonalization, derelaization DP/DR. Its happens when you are basically worn out from all the stress, anxiety and worry. Its common and wont hurt you it is just weird and no one likes to feel that way.
