Ttc after miscarriage

I had an early miscarriage on Oct 6. I was only 5 weeks along. I only bled for 5 days and the following week, I felt much better and well, one thing led to another. I know that was probably too soon and my doctor actually told me to wait two cycles. She told me this at the follow up apt that was after the fact. Anyways, has anyone else had a miscarriage that only waitied a short period of time after to start TTC again? Are you suppose to use the first day of the miscarriage bleeding to track future pregnancy? If so, I am suppose to start on the 31st and I'm already feeling some cramping.