Bad gas! Help?

Amy • Expecting a baby boy in April!
I'm 35 weeks today, and for the past week or so I've had really bad gas/trapped wind, and I've been going to the toilet aaall the time. It's not a stomach bug, because I have no other symptoms. I haven't eaten anything different lately either, so it's not my diet!! Anyone know why this is, or is it just another annoying pregnancy thing? 
Baby did drop the other day, so I don't know if it's anything to do with my body preparing for labour? Could it mean he's coming soon?