Hello, Thanks for sharing your health concern with us. In the current scenario, I would ask you to get urinary tract infection excluded through urinalysis as you have cloudy urine. The infection also can give rise to abnormal menstrual patterns, systemic illness, nausea etc. You also need to have a trans-vaginal sonogram to know the status of the pelvic organs and to detect a possible pregnancy. Further management can be planned accordingly. Brown discharge during the natural menstrual cycle indicates old collection and perhaps some hormone imbalance. Implantation bleeding is a fresh bleed. Hope you find this information useful. Take care.