I am a 36 Year old male. Overweight, smoker. Today I suddenly felt dizzy while sitting at my desk in office, there was a slight pain in the chest (upper part of chest near the neck). I checked the blood preasure, it was 100 / 70 (I normaly have a blood preasur in the 115 - 120 range). I am currently taking a course of azithromycin for a cough, and it has been a little stressfull lately. I am a little worried, is it just low blood preasure or could it be something more serious.