Can you please tell me...
How long have you been experiencing the abdominal pain?
Is the pain in lower area of abdomen? towards right, left or middle of abdomen?
Have you been having a "normal" menses (if applicable)?
When are you due to start menses (if applicable)?
Abdominal pain can be stemming from a multiple of conditions and/or organs. This sounds as it may be more related to the ovary(s), uterus, or intestinal. Although this may be related to another organ or within the abdominal cavity, the symptoms of increase in discharge and/or pain with intercourse may be more closely related to the female organs. Cyst's, tumor's and other conditions may cause these similar symptoms to arise. General pain in the abdomen may be related to intestines, stomach, kidney(s), pancreas, liver, bladder and other's.
Due to the symptoms you are experiencing, I would suggest that you make an appointment with your Ob/Gyn doctor, as he/she may further examinate in order to determine if symptoms are stemming from here for diagnosis and treatment if necessary. He/she may further refer you to a gastric-specialist or primary care physician, if his/her findings are negative in respect to these organs, for further examination if needed.
If you have any further questions or concerns, please do not hesitate to ask.