When I first wake up in the morning it feels like I have indigestion, and when I get indigestion I get really bad brainfog. It feels like I am thinking really h

When I first wake up in the morning it feels like I have indigestion, and when I get indigestion I get really bad brainfog. It feels like I am thinking really hard but the thought is blank. Usually after an hour or two (and a few big gurgles from the gut later) it resolves itself.