Oh, gosh, bloating sucks, I hate it. It is so uncomfortable and painful!
I would try to get in to see a doctor about it. I would also start a food + symptom diary, where you record what you eat, how much, and how & when your tummy feels more or less bloated, and if there are other symptoms involved, and what you are doing to try to treat it. You can use the Nutrition Tracker for this if you want, or you can write it down in a paper journal. A paper journal that you can show during your appointment might be better for demonstrating to the doctor that you're serious about this and mean business.
It could be a simple food issue, but there could also be other things going on, especially since you say that it doesn't matter what you eat or drink, your stomach is still bloated. And the best way to find out is by going to a doctor so that diagnostic tests can be ordered and proper treatment be implemented. Bloating can be nothing, or it can be an early sign of some serious conditions, so if it's been persistent, get it looked at!
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