Why do i get dizzy when i eat?

Okay, I'm 16 year old girl and I'm pretty healthy. For the past 4 or 5 months though, when i eat, normally sugary things but sometimes any food, i get a 30 second dizzy spell a few seconds after i swallow my food. I'm sure i'm fine, so i haven;t said anything to my mom about it, it's just been going on awhile, so i dont know if i should.