answered question
How old are you? You need to talk to an adult. One of your parents? If you do not no the answer you are to young to be on this web site!!
answered question
Did you have some major surgery or some kind of trauma where you were lying in bed for awhile? Poor circulation problems? Because this can happen from lying in bed for some time. Or if some kind of trauma,loosened a clot and it traveled up your leg per artery or vein to lung.