I have had triple negative breast cancer twice. Both tumors were 3cm. I am now almost 5 years from first diagnosis and 3 years from 2nd diagnosis. My oncologist said about 20%of all BC are triple neg. I have always tried not to get too hung up on the stats. I ditched DR Google a long time ago, he's a scary guy. There are many women on this site who are triple neg so you are not alone. It is such a scary time when you are first diagnosed. Try to take one day at a time (easy to say). I am so sorry to hear about your husband. BC is hard enough to deal with, without having another family member fighting a battle of their own.
Sending you a huge cyber hug.
Paula x