Hi,
According to your information, you are a very positive person, but sometimes you feel you are not able to express yourself, which hurts you internally. As per your medical condition, you are a patient of pcos. Sometimes, in pcos mood swings, feeling sad & emotional is their symptoms only. But if you are too bothered by them, then consult a psychologist who will help you with proper guidance to overcome these feelings.
Next Steps
Meditation & deep breathing practice will help you till then.
Health Tips
consult for proper guidance