welcome to HCM.
You are presenting with missed abortion
and take Misoprostol
tab near about 20 days ago.
Now it is still bleeding and usg reveals intrauterine products of conception.
At this stage,best option is D & C (it is short surgical procedure for evacuation of intrauterine products followed by curettage).
No need to afraid and it is done under anaesthesia. It also reduces unnecessary bleeding and other complication.
So consult with your doctor regarding the procedure.