Day 4 opti and PATTS question

Well I am on day 4 of opti 10 more to go. I have noticed this is the first day I've not woken up starving which is nice. I actually didn't have my shake until about 30 min after I woke up. I'm hoping this trend lasts cause I was definitely getting hungry about an hour before each shake up till now. I've lost about 2 lbs so far I don't know if that's normal but I'm following the diet exactly so I'm sure it's doing what it's supposed to do. I also have been lucky enough so far to avoid any bathroom issues. I started having benefiber about 2 weeks before I started opti so that might have helped. I definitely have the whole dry mouth I can never get enough water in me. They boyfriend hasn't said anyone about my breath but I'm sure it's off. I used those ketostix to see if I am in ketosis and I am so I'm sure everything is going how it's supposed to. I have my PATTS Apt on Wednesday morning at 7 am. Just wondering what happen at that appointment and what I need to know. Should I be fasting for blood work or anything? Any info would be greatly appreciated.  Thanks for all the support so far.