I Have Miscarriage From About 17 Days...I Make Ultrasound At

I have miscarriage from about 17 days...I make ultrasound at day 12 still i have 1.5 to 2 cm bits in my uterus..the doctor said it maybe get out normally and asked me to take the metherjen 200. I didn't found it! I asked pharmacists he said that dicynon is the same. I want to ask you can I wait for my next period without any medicine because i dont see any blood except small bits!