menstrual period after chemotherapy

I am 41 years old, I have been treated fro breast cancer, finished chemotherapy treatment end of August - and i have received my menstrual period now - is this Okay

yes. it ix ok/ But you have to flollow the peroids as well as your hormonal levels especially if you are treated with tamoxifen

i am not treated with tamoxifen - i have a treat of herceptin every three weeks for one year - is it still okay that i have received my menstrual period just a month and half after chemotherapy ?