1. Progesterone Use:
   Progesterone is used in pregnancy to support the uterine lining and maintain pregnancy.

2. Route of Administration:
   Taking a vaginal progesterone capsule orally once by mistake usually does not cause significant side effects.

3. Possible Effects:
   You might experience mild side effects like nausea or stomach upset, but serious issues are unlikely.

4. What to Do:

   • Monitor for unusual symptoms such as severe abdominal pain or heavy bleeding.
   • Seek medical attention if these occur.

5. Future Use:
   Continue using the vaginal progesterone as prescribed and avoid oral intake unless advised by your doctor.

If you have concerns or feel unwell, contact your healthcare provider for personalized advice.