Since yesterday i've been having regular heart palpitations...is this concerning?

Merits evaluation.: Palpitations can be due to an irregular or rapid heart beat and it merits a careful history and physical exam to determine the cause. See a physician who can do the exam, take an ekg and send blood tests. Common causes include an overactive thyroid, infection and dehydration. Rarer causes include a neuroendocrine tumor called a pheochromocytoma.