Missed miscarriage

Sa

I went Thursday to get my ultrasound. Baby was supposed to measure 8 weeks 6 days, baby was measuring 7 weeks 1 day. It had stopped growing, no heartbeat or blood flow. How long can it take to miscarry ? Or is the pill option better? I don’t want surgery. And I chose to wait for my body to do it on its own, I’m holding on onto that 5% for my baby to be okay. But the truth is that is not possible 😭