What Causes Pain In Lower Abdomen And Vagina With White Discharge?

Hello, i am a 19 year old female, for the past 4--5 months i have been having sharp pains in my lower abdomen mostly on the right side sometimes it gets unbearable i cant move sleep or anything.. i have also noticed brownish discharge that is constant, and also lately my cervical area haen hurting some times sharp pains when i sit down snd if i try to have sex the pain gets extreme and if feels as if there is a swollen area