I find i question reality a lot too...who can i trust in this unreal place? who is really there for me...are these things all real or is it a figment of my imagination??...or is it even my world...my reality that has come into play finally?
do u know any grounding techniques?
Here's one that one of my psychologists taught me...all u have to do is name five things with all ur senses in the room/place ur in...it will put u in ur place and as u 'feel the cushion' underneath u u will begin to feel at peace, but rather its kind of a reality check too....i find it helps