Been feeling very tired. lay down to take a nap but can't sleep because my heart is racing. i took my pulse and it is 108 per minute. what should i do?

Can call the doctor: One's doctor can help decide if a fast heart rate is ok or not. For example, is one's heart rate is normally 100-105, then 108 is normal for her. The doctor will as about meds and foods. For example, taking a diet pill or decongestants can raise the heart rate. Drinking high caffeine energy drinks can do it too. New illnesses such as fevers, too much thyroid hormone, etc..., can raise heart rates.