My heart has been racing (=> 14 successive beats) for over a week when I inhale deeply or bend over. I dont have pain. I do sometimes get a head rush.

Hard to say. But if the symptoms you report have lasted for this long and bother you, then you should seek an inperson evaluation. You may have something going on that could predispose you to your heart beating fast and/or irregularly. In the meanwhile, avoid stimulants like caffeine or energy drinks.