Being busy is not the same as being productive.
I learned this the hard way. My calendar was full, I was jumping from one thing to the next, I felt like I was working all the time. But when I looked at what actually moved, it wasn't much.
When you're always working, you can't see the bigger picture. You can't tell motion from progress.
Quick check: look at yesterday. What did you actually produce? Not how long you worked. What exists now that didn't before?