Last year I got covid, I had light symptoms post covid I started to feel a bit lathergic and now the feeling got intensified always feeling sleepy, also feeling a little bit of pain on my back near the heart region I frequently sit on floor some times during raising I feel a bit of pain near heart also having pin pricking sensation on my legs and hands if I fold them, sorry for my prejudice I'm not a health professional but I came to know the some cases has blood thickening post covid is there any thing to worry please help...thank you