Please do a home urine pregnancy
test now to rule out pregnancy. The days of unprotected sexual intercourse are many. Hence is it is difficult to predict if you have conceived in this time. Doing this test now is the simplest solution to the problem now.
Depending on the test result, you may proceed further.
The symptoms you are experiencing are seen in pregnancy too. That is why it is a possibility.
Else, it should be normal progesterone
excess phase and should be gone with time.
It is wise to meet a Gynecologist.