I agree with starlight , get rid of the ketostix , everybodies body used ketones differently and some people will never produce a positive urine stick but that doesnt mean you are not in ketosis . I only ever show a very very slight pinky colour , and it has to be first wee in the morning and its barely any different from the negative colour .. and I have lost 8 stone , so you do not need to show dark pink for this to work .
If you are feeling that demotivated then I would suggest you weigh yourself as you will have lost weight ... make sure its first thing in the morning after a wee , and I bet you see a great loss
Ketosis only helps you stick to the diet , its the low calories that make you loose weight