My father who is 62, high bp patient years is now suffering low bp and mild suffocation post covishield. It started when he got covid last oct, got better and restarted post vaccine. Bp ranges between 59-65 without bp medicine. All blood works look fine. Suffocation gets Worse at night while sleeping and makes it uneasy to sleep. Mild relief with budecort puff / nebulization/ steam with viks What should we do ? Is this a cardiology issue or respiratory ?