Sandi,
Gaining a half a pound is normal. I have gained up to 5 from being err ahhh constipated..
Don't you fret my friend, it's all good. You'll lose that half a pound and then some very soon. Just let your body adjust to the changes. I usually gain several times a week and by the end of the week it's down. I don't fret over it so you don't either ok my dear friend.
I love you too much!!!