When i was younger i was left handed now i'm right?

I also used to be a lefty. I first learned to write with my left hand and changed to right when I was in 4th grade.I don't write with my left hand anymore but I do things with both hands all the time with no problem.If you have to (worst case , you lose your right arm) then you could learn to write with your left hand again.People do all the time.The human body is incredible at fixing itself.