Don't beat yourself up, Brona, just get back on the wagon and drink loadsa water. I let myself break out now and again too - it's only water weight and will go shortly. It's physiologically impossible to put on 2lbs fat overnight.
And forget induction if you don't want it - I never went on it in the first place and lost all my weight, almost 3 stones, eating up to 60 carbs a day I'm stalled now, though, even at 30 carbs, so may go back to the 60 again and cut calories/up exercise to kick start loss. But I'm easy - life is for living and I didn't get to this weight overnight so it doesn't have to vanish overnight either.
Babs