I am 48 and perimenopausal with periods every 26 to 60 days. My husband and I used NFP during most of our married life, but have not used anything in the last five years (our youngest is 16, and I needed Clomid to achieve that pregnancy).
Recently, I was diagnosed with early stage breast cancer and will be starting Tamoxifen next month. My doctor greatly advised us to avoid any possibility of getting pregnant when I am on the Tamoxifen and suggested using barrier methods since the Tamoxifen can sometimes increase fertility.
Is it possible to use NFP to monitor fertility while on Tamoxifen? Temperature vs mucous or both? Please advise.