Finding the sac after misoprostol?

Alicia
I'm taking misoprostol tomorrow for a missed miscarriage that occurred at 5w5d but I would be 9w. I'm terrified of the pain but my doctor recommended against a d and c because I previously had cervical cancer and a lot of surgeries and it could increase my chances of having an incompetent cervix next time around. I wanted genetic testing done so she told
Me I have to collect the sac at home. Has anyone else done that? How can you tell the sac from a clot? I'm dreading this whole process.