How To Treat Frequent Flatulence,constipation And Abdominal Pain?

Hi Doc,Why do i keep farting every minute? I pass gas more than 50 times a day, and they really stink. I also have constipation and abdominal pain that lasts for days, and they get worse after meals. I always feel uncomfortable, like there is something in my stomach. I have the urge to poop, but i can t. Please help!