If you are a programmer already, you might feel like you haven't achieved enough, but that's normal. That feeling is called Imposter Syndrome. I felt this myself and It wasn't really easy to deal with it. The best way to deal with this is to look back when you just started programming and just realize how much have you achieved over time. Take a look at your first program that you wrote and compare it to something you wrote recently and tell yourself, wow I did this!