TNBC - no chemo has worked. Suggest?

Surgery of right breast was done( doctor said he couldn’t remove it completely)IHC confirmed TNBC.4 cycles of chemo done- Doxorubicine/Cyclophosphomide(AC).After this CT done not sure what it says.then weekly paclitaxel started(12w) In between for 3 weeks pacli was paused because patient got toothache and had to remove the tooth. During paclitaxel patient kept getting pain with swell near operated area and underarm but doctor said it is common and asked to come for radiation after 2 weeks. Then doctor asked to go for PET CT since the swollen part looks like tumour.PET done- showed huge tumour. 3 cycles of Gem+Carbo chemo done but tumour was looking still more huge so PET was done. It confirmed increase in size of tumour and spread to other parts. Hence re-IHC was suggested.re-IHC done on old biopsy lump showed Triple negative again During this time patient was getting headache so MRI was done. It showed spread to brain. Doctor is saying no other solution. Can you please suggest?