i know how you feel; i miscarried before my son also and it was devastated. so first and foremost; i am so sorry for your loss.
as far as what should you do - thats up to you. it all depends on how you feel. for me, i just wanted it done and over with. it was december 22 when i had my D&C. i didnt want the miscarriage to start on Christmas, and i just wanted it to be predictable, safe, and done with so that we could try again. not the best way to mourne i know, but i just wanted to be done. if it was a miscarriage, thats all, i didnt need it to carry on.
as far as what it was like, i was devastated and lonely (my hubby couldnt get off work, and i think he was mourning in his own way too, he feels horrible about it now...) and scared; i had never had any kind of surgery before - even though there is no incision, it was like surgery i guess. i remember waking up a couple times and i felt like i was just talking and talking and talking and talking... but im not sure. it was surreal. after i was very tired, and sad and of course had numb legs. :P
there wasnt any pain or anything, but the bleeding was interesting, and the discharge was large and i could literally feel them passing. it was wierd. but we got pregnant again 3 months later, and our son is the dream we always wanted, you know?
anyway, im so sorry again; its very painful to go through this. i hope that my story can help you decide. please dont hesitate to message me if you have any questions or just want to talk. its always nice to talk to someone who has been through it.
*HUG*