I am on day three of my 2 week diet and am having a lot of nausea. Is this normal?

No, it is not...it is a symptom indicating that you may be dehydrated.

In addition to your Protein shakes, continue to sip Water or any other sugar free and fat free beverage of your choice. I mean, continue to continuously sip fluids.

Dehydration is a serious medical condition...so if you are not starting to feel better within an hour or 2 at the most, you should contact your surgeon's on call service to ask for medical advice.

I ended up in the hospital with severe dehydration which I did not recognize...my only symptom was nausea. I felt better after IV fluids and drinking alot of water...

I hope you feel better fast!

I am drinking sooooooo much water that I am in the bathroom every 10 minutes, however, I am also a flight attendant, and I am on a trip, so the dry air does dehydrate. I just finished my 4th protein shake for the day, and feel a little better. Is it possible for my body to be withdrawing? Like detox?

I went through some kind of detox and the first 3-4 days were miserable. It very well could be. Maybe the flying is upsetting your usually full stomach?

I'm not an expert on possible nutrition related withdrawals...the only one which I have experienced is one from caffeine which happened years ago when I had to stop all caffeine suddenly for medical reasons. Literally, it felt like a small person was in my head with a sledge hammer swinging it from side to side...for several days.

I would want to get some feedback from my doctor on the way you have been feeling...and I do believe that the switch to a liquid diet while continuing to work with your position may be a contributing factor for feeling unwell.

Best wishes to feel better fast...