Hi HappyNell, welcome to the forum. Many people suffer from digestive problems purely because you are feeding your body in a different way. You have lost 10lbs in 2 weeks so your body has probably thought ‘what the hell is this all about’ and the fat has to go somewhere. Normally excess fat is released from the body in the urine which I why you pee more and need to drink more water. Sometimes the changes can be down to something you are eating different which is not allowing the fat to bind to the blood cells and being swept away in the gut. Various things can do this like oats or other fibre rich foods so if you are suddenly eating lots of roughage like leafy green veg that can cause it. Another reason is if you have increased the amount of fat in your diet the gall bladder might be working overtime to counteract this and producing more bile. Are you eating more fat, is it the right kind of fat i.e. healthy like olive oil, nuts and avocado or are you making the mistake of having too much of a good thing like butter and cheese – both allowed but in moderation. This is not a bad thing and if it is not causing you an embarrassing problem (like not being able to get to the loo in time) then dont worry and it should settle down.
Obviously if it doesn’t improve or gets worse then you should speak to your doctor. Just a small point here that might not apply to you but as a diabetic I have all sorts of intolerances that come and go and I had the same reaction to large amounts of dairy and eggs at one point. If I had milk in my tea and no more dairy that day I was fine, if I had yoghurt for breakfast, milk in tea, yoghurt for my lunchtime pudding then omelette for dinner I would spend hours on the loo. And finally, you have not been resorting to diet pills like the fat busters XL whatever. They have that effect.