2001 SE is jerky

Sometimes, as I enjoy my Sentra driving down the road, it will start to act like it is losing power but then it will come back up really quick. If you want to know what it feels like, get in your car, get up to 70mph and turn off your overdrive (mine has a button that you can push, I am fairly certain this is standard). Now, it's not like I am not going down the road pushing the OD button or turning off the cruise control or anything. And the worst part, it is not repeatable, it only happens occasionally, sometimes on short drives, sometimes long ones. Anybody had this problem or maybe know what is causing it?

maybe you should've gotten a 5-speed instead of auto. i don't have any problems with mine.

sounds like the AC compressor kicking on