Abdominal pains for months

For the past few months I have been experiencing a sharp pain in my lower abdomen. It almost feels like something is stabbing or pushing on my intestines up to my bellybutton. The pain come and goes almost every day, multiple times a day. Sometimes when I sit down, or sit up right it feels like pressure is pushing up on my insides making it very painful. Also during intercourse or going to the bathroom I feel the sharp pains. Does anyone have an idea of what it could be? Dr.s have been brushing it off like no big deal, saying it'll pass but I see a new dr. in a week so i'm hoping for some real help.