I don't know if this is SB flu or not. It sounds a little extreme, so maybe there is something else going on, stomach virus perhaps?
If it is SB flu, don't worry, all of Ph1 will not be like this. In general the SB flu does not last more than 2 or 3 days. By the 4th day most people are starting to feel really good.
But for most people, SB flu takes the form of a headache, general malaise, low energy, and I think I've read some posts about nausea. I'd give it a little longer and see if you can manage sipping some tea, maybe try some scrambled eggs, drink some milk. If you think you are really sick and need to abandon Ph1 for a bit, then try again, by all means do so. Take care of yourself.