Low progesterone/pregnant?

I usually ovulate late like day 17, this past month I believe it was day 19. My doctor had me do day 21 progesterone level which was 2.1 which he said was low and showed I didn’t ovulate this month even though I thought I did due to ovulation symptoms and checking cervical mucus. I’ve took pregnancy tests the past three days that have a faint positive line that is progressively getting darker. Has anyone else had a late ovulation/low progesterone level only to find out you were pregnant?