Expert ReplyCondition analysis:
According to your description of the situation, there may be caused by a heart and lung disease. It'd be better that you go to the hospital to have UCG, cardiac color ultrasound.
Instructions:
According to your description of the situation, we can not give you a definite answer, you should go to the hospital for an examination, and to take measures according to the cause.
This is my suggestion on the treatment of the medical issue, and hope it helpful to you and wish you good health.