I went through the same thing you are going through. I had head hunger and depression the first few weeks because I thought I would never be able to eat again. As I am getting further out, I get the depression and ups and down feelings quite often. My hormones are running crazy and for many people this is quite normal. Just make sure you get the help you need and let us know here on the forum how you are feeling. There are so many wonderful, caring people here to help you through the rough times. Again, welcome to the forum!
It only gets better!