I was thinking the same when I decided to start my treatment but I think you're forgetting something that I could call the "Zero" period or the "pretreatment time". What experts recommend is to wait at least 4 months until start the treatment in order to have the most amount of hairs visible because not every hair will pop-up at the same time, so if you take that into account now your math is completed.
For example in my case, the last time I waxed my legs was November 9th, 2017, my first session was around 40 hours at the end of February 2018 (4 months waiting).
I'm going to wait 4 months or so for my second clearance (July, 2018 and 9 months)
My third clearance will be booked at the end of November (12 months and a half or perhaps 13 months)
We will see the results at the end of that time, hopefully I will be at least 95% hair free!
by the way: don't worry about the side effects, are quite normal! It's been three week since my first clearance and there's still redness points.