nausea in my throat

For the past year (probably longer) I've been having this problem. I feel nauseous in my throat. Thing is i never feel it in my stomach. I can't lie down when i'm feeling this it's just makes it worse (that and the fact that i'm large chested and my breasts kind of squash my throat when i lie down) So lying down doesn't help. It seems that nothing helps. Sometimes this feeling can occur when i get one of my Migraines...(the feeling of nausea makes the migraines worse and vice versa) What my mother told me was that when i was little i would go to her and tell her my throat hurts and then i would just start throwing up. I never said anything about my stomach. Do you guys have any idea what my problem can be?