Weird Flu Bug 😞

A week ago I had the flu. I couldn't eat because everything made me nauseous. I had diarrhea and a fever ( 99.9 to 100.5 ). I'm able to eat a little now but still get nauseous and I still have the weird diarrhea. I've had the flu before but not like this. I took a pregnancy test but it said negative. I'm suppose to start my period this week but I don't have any of my usual symptoms. My mom thinks I'm pregnant because she had the flu before she found out she was pregnant with me.