Feel like im always zoning out? Mind feels blank?

I don't know if im starting to just notice it now i dont think i am but im zoning out a lot recently is it my sleep schedule? because it was bad this year always waking up at 300 pm or later and staying up till 800 am, but now im exercising and have my sleep on schedule. I used to be more alert but now im just zoning out and forgetting things. Could my change in sleep schedule have been the cause????