I'm so sorry you're experiencing this much pain during sex! I know how painful and traumatic that can be from personal experience. PCOS isn't typically known to cause painful sex, but because PCOS affects your hormones, there may be something there? I'd be more curious to know if you have any kind of uterine or cervical infection or STI, or maybe even a form of endometriosis as this is more common to cause painful intercourse. If the self-applied lubricant helped, there might be something to that relating back to the mixed up hormones of PCOS affecting your natural ability to produce secretions. Have you been able to get back in with your Gyno? Also, the doctor that diagnosed you—were they a Gynecologist or your standard practitioner? I would even suggest maybe even seeing your OB/GYN that helped deliver your baby and get you through your pregnancy. They would (or should) know the most.