Can you get a false positive?

back in October my Dr found out I had low progesterone, so she put me on 100mg of progesterone during my literal phase so that way if a egg got fertilized the progesterone would make a bed for it to implant in. well 6months later I was 5days late last week so I took a 3 test and all were positive took another one yesterday and another positive. Can progesterone give a false positive?