Yikes! New "Five Month" Goal!

We have picked a couple of dates. We have decided that we will go to Disney World sometime between the last week in May to the first week in August. That means I have to get on it NOW because JUST IN CASE we decide to go the last week in May I would really really really like to lose at least 40 lbs by then. That would put me at 219 from my last weekend and at least down one size. That means I would have to lose on average 2lbs per week. I don't know how reasonable that is but I am really really going to try to get as close as I can in the next five months!