Pending miscarriage - advice

Shannon
I received news this morning at 5w4d my HCG level dropped (from 116 to 86) and that I will have a miscarriage. I don't have a doc appt until Monday so wondering, how long could this take to start? I have mild cramping (not bad) and no spotting yet. I'm so sad but now the thought this could take weeks is even worse. :( Any similar experiences?