On 9/4/2021 I had my 2nd Pfizer Covid Vaccine. I started feeling fatigued, short of breathe and light headed. Went to my local urgent care my hemoglobin level was 6.8 - I was referred to the Emergency Room where I required 2 pints of blood. Nothing has changed in my daily routine to cause this. I had my annual physical in April 2021 my hemoglobin was 12.9.