What was I thinking?

I decided a while back to crochet a cardigan for a friend of mine. Well yesterday I decided I don't like to crochet, so I am going to knit it. Couldn't find a pattern I liked so I decided to make up my own. I started it after figuring out the pattern for 2hrs. I am making it in the fan pattern, so far it looks really nice and lazy just like I wanted it.
The bad thing is, my hands hurt after knitting for a long time. I really don't like that.