MacBook Pro Trachpads' Right Click Not Working

Good Day Apple Users.

I have an Apple Macbook Pro late 2014 version and just recently I noticed that the right click function on the trackpad is not working?? I tried Apple Supports Call Support, but they weren't of any help and barely understood my situation. I am currently running OX S Yosemite 10.10.3 I tried restarting but it was of no use. PLEASE HELP ME