Inbetween FO's - Calculations-low

Goodness - I KNEW I shouldnt have done that! I started calculating - and the results are demotivating at best..
Ok - I timed how long it took me to knit 1 cm on the fingering weight yarn babyjacket that I am working on. It took me 20 minutes. Then I started calculating. I already knit 18 cms of it - meaning so far it has taken me around 6 hours at the very least - not counting the time it took me to knit the first 10 cm sample - then realise my gauge was off - then frogging the lot and starting over. Then casting on the sleeve - then realising I cast on the wrong number of sts and frogging again and casting on again. - But well - all that is behind me. The scary path is the one in front of me.
I still have roughly 90 cms left to knit (it is knit from front to sleeve - then over the back - the other sleeve and then to the other front) - meaning I have around 30 hours of knitting still left to do on that jacket. - And that is concentrated knitting - that is not halfhearted knitting while watching telly or chit-chatting or whatever..
So if I knit one hour a day - just on that project - it will take me a month to finish. If I knit - concentrated knitting - 3 hours a day on that project - then it will still take me 10 days - to finish..
Oh and for the curious - then I also calculated that each centimeter consists of around 500 stitches. That means I already knit around 9000 stitches. I still have around 45000 stitches left to knit - and the entire jacket will consist of approximately 54000 stitches..
Can I get dizzy now?