question: I have been having shortness of breath the last few days, went to doc yesterday and BP was 180/90.  This was with the 3 antihypertensives I take.  Anyway, said my heart sounded ok and lungs sounded ok.  No swelling in limbs.  Ordered a d dimer and today was told it came back positive and they will schedule me for CT sometime next week.  I am on my period now, could that cause this?  I had thyroid biopsy about 6 weeks ago now, could that be it?  I am prone to worry excessively and am trying not to.