haemoptysis common in infection no worries
Thank you for asking
Blood in sputum aka haemoptysis with associated cough
for two weeks is a classic presentation of respiratory tract
infection. If you are not immunocompromised which I am sure you are not then infection is the most likely cause.your lungs and it's functions has already been assessed and pointed clear.and the steak of blood you are worrying about I want to sooth your nerves that it is quite common. And innocuous one and does not worth worrying. If the sputum repeats blood in it I would suggest a culture of it though just to be on the safer road and rule out some chronic troubles like tuberculosis
Rest assured you are in safe hands. Just finish the antibiotics you have been prescribed with and take symptomatic remedy for cough. You will be good as new sooner than you think.
I hope it helps. Take good care of yourself and don't forget to close the discussion please.
May the odds be ever in your favour.