hey girls im 3 1/2 wks post op and since day one after surgery iv had a tingling sensation and numbness in my fingers on my left hand, the had i had the canula in. at first it was just on and off but its now been constant for the past week and my hand is soooooo weak a cant do much with it, no strength in it at all and im getting conserned now!! has anyone else had this? is this normal? xxx