Pregnant while on Tamoxifen (L Breast mastectomy with diep flap

still shocked and weighing my options-

I was diagnosed with BC in June 2014 underwent a L Breast mastectomy with Diep Flap in August 2014

I had my regular period the following month(Sept.2014)

My oncologist recommended Tamoxifen for 10years which I started in Oct. 15,2014 religiously taking Tamoxifen since then until mid January 2015, never had my period ( thought I am already in menopause) been having the worst headaches and feeling nauseated all the time. So I decided to give myself a break --- almost 3weeks after stopping Tamoxifen my symptoms did not go away.

And simply one night , I felt the nudge on my abdomen, moving and surfing - bought a PT and it came out positive. I immediately went to the clinic to have it checked and very surprised - not only that I am surely pregnant but I am too far along, 20weeks gestation.

Have seen my Onco - she did quite mentioned about Tamoxifen can cause birth defects but then again it's my personal choice and asks me to come back after I gave birth and breastfed.

Called my Breast reconstruction for my diep flap then again not concern at all - even if I am too scared that my hip to hip scar will rapture as my pregnancy progresses .

Tough decision.But I am weighing more of keeping my baby--- the strongest being I've known that despite of Tamoxifen , baby continue to grow and moving a lot now.

I am scheduled to meet a High Risk Ob next week and hoping that the tests will come less risk for the baby and me.

Any inputs will greatly appreciated.