Hi There, thanks for asking. The fact that your heart beats become irregular after activities and it remain until the next morning provides possibility that you have oxygenation problem during the night. You also mention that you have had sleep problem without any mood problem for a long time and it is also another factor which proposes the possibility of sleep apnea
. Your age and gender (according to your name) also are the risk factors for Breathing-Related Sleep Disorder
. Allergy is also another risk factor for sleep apnea. You should know if you are obese, we can say that almost definitely you have sleep apnea. Other signs for sleep apnea are: headaches
in the morning, dry mouth
during the night or in the morning, going to washroom during the night, drooling on the pillow, gastric reflux
and at the end having a thick neck (more than 15.7 inches or 40 cm). It is good to talk with your Doctor about it. Have a very good health.