So, so sorry, Sami--I know what a knockout blow "one of those days" can be like when they hit, out of the blue. I guess it's easier when you've gotten some knowledge about addition under your belt, as well as the gut-level experience to know that there's no going back without horrendous consequences.
Keep posting, in this thread but in your own thread here if it will help. There are plenty of us in this forum who know what you're going through--we've been there, probably time & time again.
Roadie