No Cycle After Chemical Miscarriage ????

About 9 wks ago I had to have a chemical miscarriage. Doc said all went well, and I have no symptoms of the pregnancy anymore. I still have not begun my cycle and I am truly stressing over it.
We already have 5 kids ranging in age from 13yrs to 14 months, I truly wouldn't mind another child, but at 5 weekd there was not heartbeat and after a whole battery of tests this was the solution my doc gave me. I have had 5 other miscarriages in the past and each time it didn't take long for my cycle to restart. This time it just isn't here and I am truly beginning to worry.
Has this happened to anyone else? I am not sure what I should do. I have called the doc and they told me to wait it out a couple more weeks, but I am not sure I can wait that long before I completely lose what's left of my mind.