Is it normal to get out of bed and take 10steps and your heart rate is 140?

That rate,if accurate, is abnormally rapid. How long does the tachycardia last? If your heart rate gradually slows down& if your resting heart rate is near 100, I would consider this inappropriate sinus tachycardia. I would look for anemia,overactive thyroid,excess caffeine or anxiety intake as causes. Your MD or a cardiologist can evaluate you & order appropriate testing.