I had a significant drop in iron and hemoglobin between 26/8/2021 to 30/3/2022.
My blood counts and iron reserve are very normal on 26/8/2021 . In between 26/8/2021-30/3/2022, two events happen

1) Pfizer vaccination on 3/9/2021 and 29 9/2/21
2) Exposure to covid infection during family outbreak around 25/2-5/3/2022
Symptoms : skin rash , fever. and mild palpitation. All symptoms resolve during early march

Unfortunately, I didn't have a blood test after the vaccination until 30/3/2022. My blood counts and everything were normal during last blood test 26/8/2021. But according to the blood test on 30/3/2022, I become anemic . Kidney, Liver , TSH , etc are all normal .Except blood counts

I had headache, nausea . during my first dose and head ache 37C, and palpitation during the second dose . The symptoms resolved in less than an hour

After iron rich diet and low dose of iron (1/4 of normal dose of iron liquid). my hemoglobin increase from 90 to 101 and from 6 to ferritin 16 two weeks ago.

I don't have symptoms of anemia Pending for blood test again in two weeks time . My bowel habit is normal, no blood in stools, no pain in stomach etc.

Meanwhile, I need to wait for 30 days for a endoscopy….Personally, I prefer MRI colonoscopy which is less invasive and shorter waiting period I can do it within a week . Well, I have to pay for it as my doctor not willing to organize it because the specialist say MRI not necessary. I think I need to act proactive rather than waiting for another 30 days.

Wondering how to check if anemia is related to either vaccination or previous exposure of covid?