Yes dissociation is a natural coping mechanism to stress and trauma and can present itself inmany ways and forms, maybe this will be of some help:
http://www.mind.org.uk/help/diagnose...tive_disorders
I think you should talk this over with your doctor or someone else that can help you with this. There are many grounding techniques, one common one looking closely at your surroundings such as picking a colour I.e pink and then counting how many pink items there are around you. I hope this is of some use and can help you gain some peace, take care of yourself. X