Hi Annie
I was one of those who had a real energy zap after going in to ketosis and felt all lively and springy.
Into week 8 though and feeling totally drained and exhausted, literally like someone has pulled out my batteries. The only thing I have changed is my activity level, been mucho busy at work and started doing some very light toning exercises so this must be what's knocking me off kilter.
Could it be the same for you? Do you have a really active job or lifestyle? TBH I don't think I could have made it to 8 weeks feeling like this so lots of sympathy for you. Fingers crossed you will perk up very soon.
K x