Progesterone levels produced by the body often go up and down. While progesterone levels tend to rise during pregnancies, the same can occur during progesterone intake. Progesterone pills, aka oral contraceptives, help in preventing ovulation. If you overdose on your progesterone consumption, or if your body doesn't adjust to the intake, it can lead to really high progesterone levels.
We mentioned the side effects of normal levels of progesterone intake in the question above. If the body fails to accommodate and balance high progesterone levels, it is associated with a condition called congenital adrenal hyperplasia. Moreover, high progesterone levels are also often linked with higher danger of developing breast cancer.
Higher progesterone levels are unusual for the body, but these do not have any known side effects. However, it’s best to keep progesterone levels under control even if there aren’t any apparent side effects at higher levels.