Fever and 13wks

Hey ladies, I'm just wondering when should you head in to the er? I've had a fever all day spiking from 100 to the high 101s. As well as no appetite, not many bathroom breaks, and severe body aches? My SO is acting as if I DON'T have a fever. Saying that those aren't considered a FEVER as if he's a dr. I'm just worried about the BABY here.. help!!