Hello, I am having a similar issue. I received my 1st dose of the Astra Zeneca on April 29th. On May 15th I went to my doctor as my extremities were numb and white (only for 1 hour), I was feeling very light headed each day and extremely weak and tired. Doctor did blood work and called me back into the office on May 18th to tell me that my iron level was at 6 and my hemoglobin was at 102. She recommended Feramax - 1 a day for 30 days. I went back just after the 30 days for more bloodwork (June 17th) only to find that my iron levels were then at 5 - lower than they were when I started the pills. My doctor then told me to take 2 Feramax pills per day with an orange for 90 days and come back for more bloodwork. Since June 17th, I have been taking 2 Fermax per day. I have also been taking Moringa Oleifera, B-12 1000mcg, Veg-Iron and vitamin C. I have also bee having a spinach shake each day as well as some liver. I started feeling better and my restless leg syndrome even diminished. I then went to get my 2nd vaccination of Phizer on July 4th. In the past 4 or 5 days now, I have again been feeling extremely tired, weak and lightheaded. Please let me know if you have discovered anything?