Progesterone test

Robin

My doctor has me got get a blood test done on day 21 of my cycle to make sure I’m ovulating. Anyone that has had this test done, can you know if your pregnant by the results that come back, or would it be too early for implantation to have occurred? Reason I’m asking, is the level of my test results that can back this time was almost double what they normally are. I am taking a different medics though, so could be that.