Ahhhhhhhhhhhhh!!! You knew it wouldnt be long before i got my 2cents worth in didnt you ... lol
Look, there really is no point beating yourself up over it! Seriously you will just make yourself feel worse and possibly send yourself on a downward spiral when you need to be climbing back up!!
Ok yes, you are now out of ketosis but DONT EAT ANOTHER THING else you will get another

lol
Like i say all the time; what do you want more, to be slim or to have that bit of food?
Food will always be there. You have done so well and its not worth throwing it away for a bit of pizza and a chocolate egg.
You've done it, there is no going back so move on - forget it and start right this instant back on yer 3 shakes and PLENTY of water.
I hope you havnt done too much damage to your weigh in but let us all know

x