Hi Uggla, welcome to 3fc! I am also the mom of 3 kids (8,7 and 2) and a cancer survivor (thyroid). This journey, although it may be slow, will only lead us to longer life and better health - so it's very worthwhile!
Since you lost so much weight (from 115 kilos to 68 - wow!) you obviously know how to lose weight. The other secret is to keep on trying, and also to find support.
I think you'll be seeing your 59 kilos this year if you keep at it - good luck!