How to detect pcos? And what are the best medicines? My sugar level in fasting is 87mg.

Clinical & Lab. Pcos is a complex disease. Making a diagnosis depends on clinical and lab features including - irregular menstrual cycles, hair growth, lab evidence of excess androgen (male hormone) level, sometimes ultrasound showing cysts in the ovaries. Most pcos patients have weight issues too.
Exam, history, lab. A medical work-up with history, physical and lab studies is required. Diet and exercise to lose weight is necessary. Metformin can help many women restore normal menses and sometimes fertility. Other rx is available to lower testosterone if elevated. Other rx can improve fertility. Check w/your doctor.