Hiya Mally, just wanted to come and spur you on and repeat what others are saying- staying the same some weeks is normal. Your body will naturally want to resist losing weight. Some lose it more easily than others so try not to compare your weight loss with those who are losing loads and loads. From what I remember you don't have loads to lose anyway- a lot of people on here weigh much more than you and the more you have to lose, the more your weekly losses will be. Stick with it, don't give up! I think it's safe to say that everyone, if they stick to the diet, will eventually reach their goal. You are really motivated and really want this!
Regarding your ketones- the more water you drink the more your ketones will be diluted and this is indicated on the strip. The ketones are still coming out! Have you noticed that if you do a ketostick first thing after you wake up, it's darker than during the day? It's because you're dehydrated from all that time you've been asleep and not drinking water. The ketones aren't diluted. This is also normal. However my advice would be to chuck away the ketostix- they're just another thing to obsess about, worry about and more expense! (this advice comes from someone who in the past has become obsessed with ketostix, weighing numerous times a day etc... Don't let it take over or eating food becomes very difficult x )