Suggest Treatment For Constant Flatulence

Hi, I m 18years old. I have been farting for 2 years. It was a really foul smell and I felt sorry for the inconvenience caused to someone who is sitting close to me. My farts leak when I m not even farting. I hold it in sometimes when I m feeling to fart but it just make things worse. I had search on this problem but it seems that I do not suffer lactose intolerance as I stop consuming milk since I was 11years old. I also stopped drinking carbonated drinks as I knew I fart more than usual when I m taking soda drinks but my farting problem still continues. Please help me. -kai