No period yet is new pregnancy possible?

Amelia

I was 9 weeks and 2 days when I started bleeding and Er confirmed miscarriage on January 6th. They did HCG and it was 13,000. Midwife did HCG test again on January 11th and it was 929. She did another draw on January 25th which was a week ago and it was at 13. But today a week later test is still showing up positive. As of today is 4 weeks and still no period.