Feeling frequently interrupted

Ok so this is very much a case of wanting to get something off my chest and to see if this is at all relatable for others especially as I am yet to get an official diagnosis (I am on the waiting list) 

I frequently find myself feeling disturbed and interrupted not just by other people but also sensory stimulation such as noise and smells. I sometimes like to zone out a little, maybe even imagine scenarios or conversations in my head. In short I enjoy daydreaming. I have always felt like doing so allows me to have my own perspective on the world around me. 

The problem of course is that life in general doesn't always allow it. If I am walking down the road in my own bubble and so much as a car comes past, or someone wearing perfume my train of thought can be completely ruined and I feel like I have to start again. 

How does one find a way to live like this?