For the last few days, I've felt mostly fine until around 9 or 10 at night (I typically eat dinner around 6), at which point I've suddenly experienced a feeling of nausea/rumbling/false hunger that doesn't go away. Eating small things like yogurt or bread keeps it at bay. By the next day, it's gone. I take nexium once a day, though on the advice of my doctor I'm currently taking it twice. I also added Zantac this evening, though I don't yet know if it's helped.
What can cause this sort of feeling ONLY in the evening?