Does anyone else question their career in programming from time to time?

I've been around this line of work for almost 7 years now and I still get these doubts once or twice a year.
Be it unreasonable deadlines, horrible people that I'm forced to work with or just outright incompetence.

My latest occurence of doubt was when getting assigned a task that initially didn't seem like a big deal, but it turned out to be months and months of custom work instead of going along with the standard components and design guidelines.

This was somehow missed in the estimate phase and once I got assigned to it a hard deadline was already set, to top it off the features was non-negotiable.

These kind of things really makes me feel helpless and really depressed. My work is all I have, and I don't really know what I would do if I'd change career path today.