[Sigurd]

What did you make the previous years, and how much did you play?

Personally I think you should try playing a bit online (at lower stakes than you play live), and use a program like Pokertracker to keep track of your play.
This would allow you to play a lot of hands in a relatively short periode of time, so you have a bigger sample size, and a better chance of analysing your play (and see the swings).

Playing a bit online would also allow you to put in some short sessions without having to go to the casino.

Have you mostly been playing friday/saturday nights? If so, are the games harder to beat at other times, where you would have to play, if you went pro?

Psychologically it can be very hard to run bad if poker is your sole source of income.