Provera to restart period stories

Cheyenne • I an 27 and I have a 3 year old boy, 6 year old boy, a 7 year old little girl, and 16 month old little girl
Has anyone used this to make their period start? I took it for 5 days and my doctor said I should start spotting by day 6 or 7 and this is day 8 and nothing