8 week US, no heartheat

Went to the doctor for my second US yesterday at 8w2d to find the baby had no heartbeat.  The sonogram tech said the baby only measured 7 weeks, so the baby had a heartbeat for about a week.  For those of you that had a similar experience, first, I am so sorry, I am so saddened by this loss.  Did you wait for a natural miscarriage or take the pill to speed up the process?  I've read that it could take weeks to miscarry naturally.  How long did you wait to start ttc again?