Re: bad case of the flu...
You need to take something for the fever, that can cause some problems with the baby, I think mainly at the developmental stages though. If it is actually the flu, sometimes it's hard to tell, you will probably be at a higher risk for pneumonia, cause your immune system is compromised from being pregnant. But most likely you will be ok, if it were me, I would probably call the dr, or go in just to make sure.
Hope you feel better!