Low progesterone and bleeding 😕

Sa

My progesterone yesterday at 5 weeks 2 days was 3.1. I called doctors office this morning to ask to get on progesterone supplements and am waiting for nurse to call back. But now I am starting to really lightly bleed and feeling cramps. Is this for sure a miscarriage or has anyone gone on to have a successful pregnancy? We tried for six months for this baby