Hun, it is best to weigh yourself else you don't know where you are starting from.
HP, my consultant gained 10lbs on a 10 day holiday. 7lbs was off in days because it isn't solid fat yet, just fluid in the system. So dont get disheartened, it isn't the end.
I try to think of if I was running a race, just against myself, and I fell over, would I walk back to the start each time I fell down and wait to run the whole thing again, or would I pick myself up, dust myself down and keep going until I got to the end? Gains don't do the damage, it is our reaction to them that determines how we get on. And I fall over plenty!