I was the same no appetite or hardly at all on day 2 I'm not even sure I did eat but like Scott just said drinking water was important as I was badly dehydrated and even with the water I wasn't right in that department for about a week I was getting full off a half can of Heinz chicken soup that was my experience
You might also start getting night sweats or have been experiencing this already it's a weird one but I think it's our bodies working overtime purging through sweat
Your doing amazing not sure why but I'm vividly remembering day 2 back in 2013 and I just want you to know you can do this it might feel like hell now but it won't last forever
Hang in there bud