Since yesterday i am feeling lightheadedness, felt breathlessness for some 1-2 minutes, not like thay i was gasping for breath etc just slight breathlessness, today i am waking, climbing Stairs without any effort. I run daily for 1 km and even upto 2kms. Have done the routine cardiac tests in may, echo tmt and holter and they were normal as per cardiologist. But this lightheadedness is making me very worried. I have to go for holiday tomorrow to mountains, srinagar gulmarg etc and i am worried. My
b12 and
vitamin d is low. Is it due to that or what. Bp is 106/75-108/78. Please guide.