If you dont eat enough?!

If you dont eat enough?

I'm 14 and I was wondering, can you throw up if you dont eat enough food. Because yesterday at school I threw-up and the school sent me home and than I felt better at the end of the day and than today I felt perfect. I didnt eat that much yesterday because I didnt feel good and eating made it worse. So could that be it because I did eat yesterday but I didnt feel the best after but than it went away. And i didnt feel that great after lunch but could that just be after effects. Could it be from not eating that much or like a 24 hour thing. Because I didnt feel that good on Saturday morning when I woke up. and than it went away when I got up. oh and I'm not anorexic I'm actually a little overweight but not really.(just so that you dont think that)
what do you guys think

1 month ago
At lunch today after I didnt feel good it but it went away also it could have just been from eating more food again after not eating that much yesterday.

What may have happened sweetie is not that you didn't eat enough, but what you ate disagreed with you. You may have an allergy to something in what you ingested.