Hi Jessie welcome!!
I have done CD in my past (had a band fitted, but still lurking!). When I was in ketosis, I got a pear smelling breath. The real result would be on the keto sticks that you can buy at Boots or other chemists. You widdle on them and if it turns pink then you are in ketosis. It also tells you if you are drinking enough water (it will turn a darker red colour).
At this stage of the plan, I wouldnt worry about it too much, you normally go into ketosis within day 3-4 any way. Also when you go to see your Consultant, she will test your urine for you too..well mine did anyway!
I hope this helps and good luck with your journey!
Kerry-Ann
xx