Any reason why I am really windy?

I am on my 7 day break from the pill at the minute and am currently 2 days in and haven't got my bleeding yet. I seem to be so windy and needing to poo quite often... I have had very slight cramping but my stomach is making weird noises sometimes. Could this be anything to do with it? Is there any reason why I am so windy and when my stomach gets sore, it is always just me needing to poof! Any explanations? x