Triple negative breast cancer diagnosis

Hello, today I have been diagnosed with TNBC and am in a complete spin about it! As soon as he said it I went into a massive panic as I know it's aggressive and less easy to treat and I'm now scared out of my mind. I'm to have an MRI and CT scan within 2 weeks and then probably straight to chemo.

im 43 and wasn't offered gene testing and I wonder if I should have been as I have a sister and 6 year old daughter to consider 

I guess I'm just hoping there are ladies out there who have had a similar diagnosis to me and are doing well?