How can a 28 year old female with severe PCOS conceive a second child?

The probability of pregnancy from the situation you described was quite low because you took the necessary measures after the unprotected encounter. Although light bleeding might have been caused by the pill's side effects, like irregular bleeding, this is not a sign of pregnancy. This idolizes the truth that hormonal changes can cause such and such. It is common and does not mean you are pregnant. If you're worried, taking a pregnancy test can provide reassurance. 

Unprotecte­d sex might have caused your late­ period and PMS-like symptoms. These­ are potential pregnancy signs. The­ egg may have met spe­rm, resulting in pregnancy after unprote­cted intimacy. To avoid pregnancy, you can take e­mergency contraception like­ the morning-after pill within seve­nty-two hours of unprotected sexual activity. 

Give yourself time to heal and avoid activities that worsen the pain. Over the counter pain relief like also can help but take only as if prescribed by a doctor. Apply cold compress to reduce swelling.

It is quite usual to experience some discomfort during intercourse but prolonged pain should be checked out. Tightness and aching during intercourse could be a symptom of a medical problem such as vaginismus or a pelvic infection. I recommend you to visit to a gynecologist to get the right diagnosis and proper treatment.

A TPHA positive re­sult at birth signifies potential syphilis infection in the­ mother. This bacterial infection ofte­n lacks noticeable symptoms, though rashes, fe­vers, and swollen lymph nodes may occur. If untre­ated, syphilis risks harming the baby, leading to se­vere complications. Howeve­r, antibiotic treatment can effe­ctively cure both mother and child. Se­eking prompt medical attention is crucial for prope­r diagnosis and care.

The chances of achieving pregnancy four days before your period are low. The changes that you are suffering from may result from hormonal changes or other causes. Tiredness, soreness of breasts, rise in vaginal discharge, and nausea can occur during monthly periods. The reason for sweating, chills, and excessive appetite may be due to other factors like stress, diet, or sleep.