Could I possibly be pregnant? πŸ™†πŸ»β€β™€οΈ

I had a miscarriage at 8 weeks 3 days last month, it’s been 3 weeks since I miscarried, I’ve been having regular sex after the bleeding stopped, and since a few days I’ve had lower back pain, tingly breasts, headaches and been hungry a lot.

What could this mean?