Flu while pregnant

I read that having the flu while pregnant can lead to hospitalization? I'm pretty sure I have either flu or strep.. it's 1am here, I'm waiting for my fiance to get off work and get home so I can go to the er.. IF it is the flu, at what point would they have to hospitalize you? I really don't want to end up having to stay..

My symptoms are -

•Headaches

•Vomiting

•Irritated throat (so bad I can't drink anything because I have a very hard time getting it down due to how swollen my throat feels but it doesn't look very swollen also cause ear pain when I do swallow as well as some throat pain)

•Shaky

•Cold flashes

•a bit of stomach pain

I'm 20 weeks exactly.