Anyone ever feel like they can't differentiate between what is normal and what is not?

Visually I always am a bit messed up, but then I wonder is this "normal" memory slips "is this normal" and yesterday for example I was beyond tired mentally- 2 kids under 2 for the day - when fatigued I felt I had speech issues and recall issues over stimulated but again I doubted that it was my head injury its got to be something else, I feel like this must happen to other people and knowing that might help me let it go.

Thought I would throw it out there it helps to hear from all you guys as this is beyond confusing.