I would agree as well. Keeping a food diary can be helpful, but sometimes you really have to look deep and also look at what you had the DAY BEFORE. I find that often I can "be bad" with my eating and think all is well, and then a day or two later, I feel the effects. It took me a while to figure this out but I think, for me, it is true. Likewise, some triggers can give me symptoms for days, so if you can figure out the triggers, keep that in mind....it's not always an instant reaction, and it's not always about what you ate on that particular day.
When my symptoms "act up", I find I do have to be particularly careful about what I eat and don't eat in order for the symptoms to subside within a few days. Sometimes, it has taken a week. After the irritation starts, then things that didn't bother me much before can bother me. Does that make sense? Think of it like a blister from raking......you don't usually feel it until after, and if it heals, then you can go rake again in a week or so. But if you rake the next day, the blister will get worse and it will take longer for it to heal. It's not the same mechanism as what causes reflux, but the outcome can be similar.......