I can tell you exactly why you put on weight Sal when you over exercise ( and going to gym each day is overdoing it!) your muscles tear and thats how they build new muscle, but it also means it'll hold onto more water to help repair it, therefore you appear to put on weight.
I'm full of useless toot me
Anyone wanting a "cosy-lou" fleecy soft buggy liner in sky blue one side and bright retro swirls the other ( it's a bit girly) universal fitting - cost me £10 and been used about 5 times (if that) looking for £5 posted - gonna put on ebay later when I find camera.