My name is Jan -I had breast augmentation a month ago. I've had bouts of all over pins and needles and some muscle weakness come and go. Think it might have come from singulair ...but have been off of it two days and it's still happenning? Could there have been nerve damage during surgery or is this perhaps the remains of medicine in my system? I'm 39, five foot five and have been VERY healthy my whole life. 117 lbs.