Hii dr before days i sleep and wake up for washroom atleast 2am once I came from washroom and lay down I feel shortness of breath and unable to take breath due to this I am panic and after few hours it's came down normal my heart is beating that time too much faster I am very worried about this if it is happend again. Below test done Cbc-normal Thyroid-normal Blood sugar-normal Ecg twice- normal Echo-normal Urine test-normal