How does amnesia feel like?

This is for a story I'm writing, so I hope it can be most realistic.

So after a terrible incident that happened to this girl called Ana, where she had a brain haemorrhage and went into a coma for quite a bit, she wakes up not knowing who her best friend, Ben, is. They've known each other for ages but she thinks she met him at a bar just recently. Her childhood is a whole series of bad stuff after her parents died at the age of 9, but she thinks her parents are still alive, and her whole childhood is fabricated. It's temporary, according to the doctor. So she spends time with Ben, and they get real close, not the way she would have when she was the way she was. She gets back some of her memory in snippets as months with Ben go by.

So my questions are:

1) would she remember her few months with Ben after she gets all her memory back? or will those few months feel like an empty, blank slate in her mind?

2) how will she get her memory back? Is it like waking up one day and the whole thing just hits you?

3) will she be aware she actually forgot everything?

4) if the person she is as an amnesiac as compared to who she really was are two really different people, and she gets her memory back one day just waking up, would she still act as how she is as an amnesiac, or as her real former self?

5) if you suddenly remember everything, is it scary?

6) will she remember what she did and said as an amnesiac when she gets her memory back?

Thanks for the help! :)