Hello, I've Been Having Tight Bloating, Burping , And Gas.

Hello, I've been having tight bloating, burping , and gas. I think it's due to my birth control pills but I'm not completely sure. I do take them everyday. So I was wondering is that's the reason or pregnant? It just started Friday till now. But yesterday when I had a bowl movement I was relieved just burping but when I took my pill last night I feel the same today.