18F fighting to stay awake after every meal but blood tests are fine

18F, 75kg, 5’6 I have to flight to stay awake after almost every meal especially during the evening. Usually after dinner I get so tired it feels like my entire face is puffy and my blood is burning. This has been happening for years since i think 13? My meals mainly consist of rice and south asian cuisine, sometimes I eat pasta and pizza but that’s really it.

It’s unbearable to stay awake and if I sit on bed after eating a meal I will somehow fall asleep and take a nap for hours. At first I thought it was because I eat a lot of sugar but then I stopped sugar and milk for a month and it continued.

I am not diabetic or pre-diabetic but a lot of people in my family have it. I took a blood test for everything about a month ago and everything with my bloods were fine except for calcium (2.29mmol/L), transferrin saturation (14.7%), RDW (11.3%), Lymphocytes (3.25 10e9/L) and eosinophils (0.53 10e9/L).

Although i did randomly gain 20kg I think around the end of 2022 and it’s been extremely difficult to get rid of the weight. I’ve been walking 10k steps a day and nothing is budging. I’ve taken blood tests over the years and nothing bad came about other than low vitamin d levels that I took meds for.

My doctor told me it was normal to feel tired after a meal.

It’s not diabetes causing it.

I drink milk everyday so idk how I have low calcium but other than that but I am still fighting for my life to stay awake after eating a meal. Even as I write this I’m tired as hell, my face aches and my blood hurts too if that even makes sense.

Does anyone have a suggestion why? What should I do if the dr keeps telling me that it’s normal.