Ay, I totally understand your worry, nakakaanxious talaga yung paghihintay! A few of us moms have been through hormone treatments, and honestly, the timing can be really unpredictable kaya hindi ka nag-iisa dito. That said, since it's been 15 days na and walang period pa, I'd really suggest you check in with your OB agad para ma-rule out kung ano exactly ang nangyari, baka kailangan ng follow-up ultrasound or blood work lang to see what's going on. Hindi ko bet mag-assume kasi ang Duphaston response ng bawat katawan talaga ay different, pero doctor mo talaga ang best person to advise you next steps!