You do need to see your doctor for a full blood work up. Being tired as you describe, can be due to blood sugars, thyroid, anemic. Some can even develop food allergies (which is more on the rare side) Electrolyte imbalance and even possible CFS (Chronic fatigue syndrome) So do start with a full blood work up, which majority of the things listed above can be detected via the blood work and give your doctor a clearer picture of what is going on and you can get to feeling better.
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