Hi Shat I have just completed 4/6 cycles of TCH as well. I ended up with periods for three weeks and my onc suggested progesterone or zoladex to stop the bleeding as it was affecting my red blood cell count and I was feeling very tired and breathless. His next step was to talk to a gynaecologist if the bleeding didn't settle. Fortunately my periods stopped by themselves in the fourth week, but I know how draining it is to cope with them whilst putting up with all the other side effects of chemo.
Might be worth asking to see a gynaecologist as well.
Loreto