Blech to all of you!

I've gained 5 lbs in the last week! I think it must be water or baby, because I've been eating pretty healthy. No way I could have gained that much based on what I've eaten. That puts me at 48 lbs. I can't figure it out, I put on a pair of sweats that I bought on our honeymoon when I was the very skinniest I've been in 10 years and they fit me fine (I can't pull them up over my belly, but they fit my legs and butt)!