When Do Periods Begin After Taking Tamoxifen?

Hello, pls I am taking tamoxifen for fertility, it’s been over a month after I took them, I’ve had pregnancy symptoms (all in the books) but still with a negative urine pregnancy result. My question is, when is my period supposed to come after taking tamoxifen? Pls help I’m literally losing my mind and getting depressed. My medical history; Diagnosed with PCOS, completely irregular periods Last period was December 2017, I was supposed to take the tamoxifen from day 2-day5 of my cycle, but since I hadn’t gotten my period in 5 months I just took the drugs for four days and stopped. Now it’s been over a month after taking it, no period... so much symptoms that could pass off as either ovulation or pregnancy and still no positive PT result nor period bleeding!!!