41 here. Mine isn't triple negative, but apparently close enough that I've been treated as if it is, but with one extra injection of goserelin, to stop oestrogen production.
That first bit, before I got into the swing of things with treatment, was the worst part. So much information to take in, so many unknowns, and the waiting for chemo. I struggled quite a bit mentally through that. Once I started chemo, I found it all easier to deal with.
The chemo hasn't exactly been fun, but it wasn't anywhere near as bad as I'd feared. Tiredness and brain fog were probably the worst bits, but getting in a short walk at some point, and an afternoon nap during my lunch break, has kept me going.
I am now post op (excision, aka lumpectomy), having radio therapy and a further 8 cycles of chemo (2 cycles in), to try to make sure it doesn't come back. We're planning for the future again, after feeling like everything has been on hold.
Things that helped me through chemo:
Audio books - low effort entertainment, thoroughly reccomend "Doctors get cancer too'' by Philippa Kaye. I also found audio books helped me get to sleep when I struggled.
Snacks you can eat one handed - if she has steroids pre-treatment, the hunger is ridiculous!
Having a port a cath fitted - my veins are rubbish, port a cath meant not struggling to get a needle in, and no more bruise covered arms
Drinking plenty of water. I was advised 2L a day. Always felt worse if I slacked on drinking my water.
Making sure I had some time to myself to process my emotions, and have a bit of a cry. Maybe sounds a bit daft, but it's a lot to take in, and it all seems to happen so quickly, it can be really overwhelming. Having a good cry, and not bottling it up helped me cope.
Sending love and strength x