experiencing extremely sharp pains inside around my stomach

I'm a female_21 years of age, I've had a kid 2 yrs ago and hadto have a c-section.. I'm experiencing extremely sharp pains inside around my stomach under my sternum.. I've asked doctors and all they say is acid reflux. Or it will stop if you lose weight. Well I've lost weight an ate right and it still comes back. Usually 2 to 3 times a week. Some people have told me it's my gall bladder. My family has had problems after having children like me. Experiencing exact same pains. One had to have her gall bladder removed an the other had a bowling ball sized cyst in her overy. No joke. These pains had dropped me to my knees and have brought me to tears. Also it makes me nauseated and the pain usually lasts 2 to 5 minutes. I've gone to the doctor three times over this and there not doing anything. Please help. I don't know what is going on.