Anyone else has severe fatigue after eating?

I'm wondering if any of you guys are also extremely tired after eating? What illness could cause this feeling? (Not seeking for medical advice.)

I thought I might eat too much at a time, but I'm paying attention to this now and nothing got better. I eat because of this 7-10 times a day, always just a little bit, mainly low carb foods, lots of veggies, ect. Also, I've gluten intolerance so I don't eat gluten and foods that worsens my GERD.

My smartwatch sometimes shows 110 bpm while eating but it gets better after lying down, and not every eating. But I've always (!) extreme fatigue after eating, no matter my heart rate. It becomes better after lying down for half or even 1 hour!!!

I take meds for GERD and depression.

I can't live like this anymore. What kind of doctor should I visit? If someone struggles with similar issues, what helps you??

Thanks. Stay strong everybody 🫂