I am so sorry you are feeling isolated. Have been reading your blogs and see you are 1200 km from Brisbane, so I'm guessing north-west or north. I am in SE Qld, so not much help geographically but we can chat online.
I am TNBC too, diagnosed last April with Grade 2 Stage 3, and like you, found my lump in the shower, between mammograms and US's. I had bilateral surgery, chemo & rads, and then a hysterectomy - hopefully to cut the percentages of recurrence. At present I am in remission and feeling normal apart from numb-ish toes and reduced energy levels.
Apparently the best thing we can do for ourselves is diet and exercise - lots of vegetables and at least 30 mins a day workout, walking or gym. I also do yoga because it is so relaxing, in a class set up by Anahata Healing.
There is an enormous amount of research going into TNBC and they are getting some really good lab results. Hopefully there will soon be trials. All we can do is be as strong as we can to fight this in the meantime.
We are all here for each other. The pink sisterhood is just wonderful. Keep posting so we know how you are going. Big hug,
Michelle xx