The fact that you are peeing so much is a good thing!
It's a sign that your body is burning fat, as every time you have to pee you are expelling the ketones that have built up from burning fats (hence,
Ketosis!)
Your body will eventually get used to the upped water intake and the buildup of ketones, but it can take a few weeks to get back to what seems like a "normal" amount of loo trips.
Also I thought I read the more water you drink the more weight you lose well I seem to weigh more after drinking loads?
Well in effect, if you drink 1 litre of water (which weighs 2.2lbs) you will immediately become 2.2lbs heavier, because you now have that additional weight inside you - just the same as if you stood on the scales holding the bottle of water!
What people mean is that increasing your water intake helps 'flush' the ketones and other nasty things produced from breaking down fats from your body, which in turn leads to your body being more efficient at burning fat, so you lose a bit more over time.
Remember, your weight can change as much as 7lbs within a day - it will *never* stay at the exact same place because your weight comes from
everything that your body has; bones, muscle, stomach and bladder contents.. stuff that you just can't control. Everyone is lighter in the morning that in the evening, if you drink lots of water just before you get weighed you will appear to weigh more, if you don't drink enough water your body will be rubbish at burning fats and you won't lose as much, if you get a bit constipated it can make it seem like you haven't lost as much weight.....
Although your weight is a good guideline, it's not the only thing to look at - measurements are better (waist, arms, thighs etc) and how your clothes fit are, in some ways, better for showing you are losing fat. Having a bodyfat test (done with calipers, literally that "can you pinch an inch" test) is also a great way to see how you are doing because it accurately measures where bodyfat deposits are stored.
From my measurements and my clothing I have seen that since starting my weight training, I have had weeks where I have gained weight (from building muscle), but still lost bodyfat - scales alone wouldn't show this, they would only have shown a gain in overall weight.
So, don't panic if you appear to gain a pound or 2 after drinking some water or getting regular exercise; it'll be 'fake' weight from water, or 'good' weight from muscle toning/building
