Hi Sid!
Try a few things to isolate your problem.
1.If necessary adjust your track brackets so there is about a 1/4 to 1/2″ play between the door and track at any given spot,and make sure your tracks are plumb.
2.Clean your track and lube it w/silicone spray,lube your rollers,hinges,and pulleys.
3.Have someone check and adjust your torsion springs(they can be dangerous).
4.Clean and lube the garage door opener chain w/wd40.
These things are excellent routine maintenance even if your not having problems,but if your problem persists it is your opener..hope that was of some help!