Miscarriage question...

So I believe I have a blighted ovum, and I found out at 8 weeks that I was only measuring 5.5 weeks. I haven’t had a single drop of blood or any spotting and I’m nearly 9 weeks now! I was just curious when will I start to miscarry? How long did it take others to miscarry? I feel so numb to this pregnancy, I just want to have a sense of knowing what to expect.