Hey Jules, do not worry you are not on your own i too went through a period like that for a good couple of months. I was constantly worried that i wasnt really here and that i was just looking in at the world! I actually thought i was dead, may sound strange!!
I found being in other peoples company really helped as it brings you back to earth and the current situation.
I sometimes do have bouts of anxiousness and thinking that im not really here but in time it does go, so dont worry.
When it starts to distress me i usually think of other things such as where i would like to go on holiday and picture myself on a tropical island drinking a Mohito!!!!
Think positive thoughts and dont dwell on the negatives.
Your not alone.
Much love suz x