Tamoxifen - Periods

Hi there. I am now on my 5th month of 5mg of Tamoxifen  ( DCIS diagnosis, 2 ops and 15 days RT later ),and have been regular like clockwork and periods have been less painful and lighter. However this month the period hasn't come. Context: I am 48 year old, and was going through peri M already before all my diagnosis in Sept 2025, but had to stop taking HRT immediately on the spot. I wanted to ask if anyone knows or has seen this as side effect where the Tamoxifen can stop your periods? I would be very happy if its the case ( no chance of pregnancy ) but as have had so much going on hormonally pre diagnosis and ops, and since, I get a bit confused as to what is going on with the cycles : ) Any insights or own experiences on this one do share? I am seeing my oncologist in Sept and my next period may start in a month...but had wanted to put the question out there to this lovely community.