based. Progesterone helps to maintain pregnancy and helps as well during the second phase of the menstrual cycle which precedes menses. Progesterone given in non pregnant women is either for contraception
or to induce bleeding in certain women who have no periods.
However, progesterone is safe during pregnancy and it is given during pregnancy to prevent threatened abortions in the first trimester because at that time, production of progesterone probably is not yet adequate.
For your case, i will advice you retake the tests and also do a pelvic ultrasound
. The pelvic ultrasound will confirm an eventual pregnancy and also give the location of the gestational sac
and in the case there is no pregnancy, it will give information concerning the endometrial lining ( inner lining) of the uterus (whether it is proliferated or not).
Best regards and hope this helps.