[sadfasf122]

Software is near impossible to estimate. Things that can be done in 1 day can sometimes take 2 weeks. And something that seems like it should take weeks can take hours.

Then you factor in the huge difference in approaches, skill, efficiency, and productivity between employees. If you are experienced, you skip the hours of googling, reading SO, etc.

You are probably pushing way harder than you need to be.

If I feel like I made good progress, I take the rest of the day off. If something should take a week and I finish it in 2 days - I take the week off.