Exactly the same. I'm ok sitting but stand up - dizziness, blurred vision, shortness of breath, numb hands and feet. After I collapsed in December was diagnosed with iron-deficiency anemia. Doctor did mention he had heard it could be result of Covid vaccine. Two iron infusions, daily iron supplements. 2 months later a lot better. Feel perfectly normal sitting. Breathlessness gone, but dizziness and occasional blurred vision persisting. Fatigue and tiredness still there. Doc says he will redo my bloods again in 12 weeks.