Hello, The brown vaginal discharge, nausea are in concern with vaginal infection through unprotected vaginal sex. The constipation is not in relation to the same and may be functional or stress induced lack of water or fiber intake. My guidelines at present: - Drink plenty of liquids - Consume high fiber diet - Bulk forming laxative as Ispaghula husk or Psyllium - Avoid spices, non-veg - Regular aerobics and walking, swimming if involved - Avoid further vaginal or anal sex if active - Control of blood sugar - Sitz bath with lukewarm water added epsom salt and Betadine solution - Prescription of antibiotic as Metronidazole and anti fungal as Fluconazole - Vaginal hygiene care - Control of stress and anxiety If needed, your OBGYN may decide a vaginal swab examination if the same has not been carried out within last 3 years. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Bhagyesh V. Patel, General Surgeon