Chemical pregnancy?

C

I’m 15 days late for AF, I’m never late but all my tests were BFN. So I went to the dr last week for a blood test and that came back negative too. The dr said she thinks I have had a chemical miscarriage and that I will get my period in the next week or so. That was a week ago and still nothing! How long did it take for you to get your period again after a chemical pregnancy?