Welcome aboard Mayroko – carb withdrawal affects us all in different ways, but I don’t think being moody and grumpy is exceptional. Our bodies will demand the carbs in the early days, causing all sorts of transient problems – headaches, moodiness, flu like symptoms, dizziness, terrible hunger pangs etc. The first weeks can be made all the tougher, by having to ride out these symptoms, but be assured that they will pass and once they have, you will start to notice the benefits other than weight loss from the BSD.
Stick with it, it will all pass in a few days. Let us know how you get on and shout if you need advise or support, there are lots of lovely folks on the forum who can offer wise words and encouragement. Good Luck!