IBS or something else?

Hi. I have always had digestive issues. GERD and Acid Reflux. But in the past year, I started having bowel inconsistency. Different textures. But the problem that worries me the most is I'm passing accessive amounts of gas. Most of the day i feel the gas in my rectum and after meals, i pass get regularly multiple times as if it's constantly generating. I dont have abdominal craping or gas bloading in the front. The only bloating I feel is right in the rectum when the gas piles up. I don't really have diarrhea or constipation, its kinda in between. Every one I read abotu with IBS usually has bloating and pain. So where could my excessive passing gas problem coming from?? I fear its colorical cancer since passing excessive gas is one of the symptoms. I have had a colonoscopy 9 months ago and there was just some flora problem or similar, they said it was fine. and 6 months after i started having this problem.

Any insights or similar experiances? Please help
Thanks.