Dear friend, thanks for being at HCM.
if not obese
, there could be many causes of breathlessness at night.
common are heart failure
, respiratory ailments or upper airway problems like OSA (obstructive sleep apnea
), or psychological .
will need detailed description of your problem
do you get better on sitting up in bed?
do you have swelling on feet/ ankles?
I would be glad to assist...