Night time nausea?

So it has recently come to my attention, thanks to an overly worrying girlfriend, that it's not normal for someone to get nauseated every night.

Before you read my condition, note that I'm not bulimic. It's not intentional when I puke, and I only really puke twice a month or so.. also know that nausea isn't puke, but the feeling before puke with the stomach acid in your throat and your mouth watering, etc

So every night, if I don't get to bed and fall asleep soon enough, I get nauseated. Every night, around the same time (about 11pm) I feel like hurling, and I can't get to sleep until I fight it and wait for it to pass. I thought that a lot of people must feel that way, but my girlfriend says it's definitely not normal, so I decided to ask what you guys think... is it really as abnormal as her reaction suggests? It's been the same thing for the past few years so I'm completely use to it and it hardly even phases my anymore except when I can't hold it back.

Should I listen to her and actually waste money and bother a physician about it?

 

Do you know what triggered it? You say it happened a few years ago, but when you first started to notice it, where there any "special" events that occurred?

 

I usually don't fall asleep before the nausea onsets, so I'm usually up until about 2 average (usually doing homework in the meantime) and I'm up at about 7am for college.

I eat breakfast once in a while, but to save time, it's usually mcdonalds. Then I don't eat until around 3 or 4 when I'm at work and my mom likes to bring me either something from subway, or leftovers that my grandma makes (FUCKING LOVER HER FOOD).

But my diet has changed MANY times over the past few years, and my condition has been steady, unchanged

I think that that fact rules out anything psychological or pertaining to my diet, since it changes and my condition hasn't

 

Try sleeping with more pillows. When my head tilts back too much, I get the same thing.