Lately this has been happening
I have ADHD, bipolar and ASD 

I've been thinking that all this is an illusion 

That I'm living in a  figment of my imagination

I'll be walking through a store and I don't feel as though anything around me belongs there. 

I'll be awake for hours at night and not sleeping thinking there's something or someone outside of my house. I don't feel this way during the day only at night. 

I know I'm real and that I'm alive however I am not sure if what's around me is.