Low Progesterone

Char

My period has started coming 10+ days late. I went to do day 23 blood tests, no progesterone. A week later, still not! They say it didn’t look like i ovulated. But when I went to do an ultrasound, there was a HUGE follicle which she said was empty as if I had ovulated the week earlier. Is this possible to have little progesterone but ovulated? I have conflicting doctors!