Test on day 35??

Samantha • Mommy of 2! TTC #3. Ectopic 3/29/18 Waiting on my 🌈👶🏼❤️

My doctor called today after reviewing my progesterone test I did on tuesday and he said I do ovulate. He also said to take a pregnancy test on day 35. Why would I need to wait so long to test?

I did test this morning and got a bfn, I’m 10dpo. Anyone else been told that? My first round of letrozole.