Thanks for your questions.
From your statement, I can gather that your heart may have started experiencing more strain from the severity of the anemia
, than it can handle...it may be failing. So, you need to urgently check yourself into a competent hospital (with specialist Hematologist
or Cardiologist service) for immediate treatment (which would most likely include blood transfusions).
Additionally, the cough
may even be a sign of a repeat PE, which can co-exist with heart failure
Whichever it is, you need to be in hospital.