I do my very best to not go in to a WI with expectations. Or with the mindset that any loss is GREAT and I'll be happy with a loss.
That being said, we are all human and the scale has a strong/powerful influence on us.
I think people can have slightly unpredictable WI's for weeks 2, 3, 4. Especially, if WI #1 was really great.
Whatever happens, hold your head high - know that you are doing everything right by being 100% OP and it will all work out in the wash.