What am i sick with..?

Okay so it started about 4 days ago. On the first day i started having a sharp pain under my ribs. It was an on & off pain for like 2 days. I stretched & massaged the area & it hasnt hurt since. On tuesday i started feeling nautious & i was having realllly bad headaches later that night & couldnt sleep. I felt like i was gonna throw up. When i woke up thursday morning, i felt sooo nautious but i still went to summer school because i had a test. My mom said i felt a little warm. & Ever since thursday at like 2, i've felt a little better. I've been drinking LOTS of water & eat normal food. I still have an appetite which is good i guess. I still feel nautious, but not as much. I can ignore it, it doesn't really stop me from activities or anything. What do you think im sick with? Oh & now my mom is starting to have pain under her ribs & have headaches. Please help.