That's really shitty you got taken out by an old lady!
my 2 cents...
Be a man, shake it off, make sure she takes care of the ped and your hospital bills, then move along with life. No need to sue her over an accident. This is what we should come to expect being grown adults on tiny machines. People don't see us, we understand that, so compensate for it.
I hope you heal up soon and start riding again, stat!