Q: TrackPad on macbook pro troubles

I have a 13 inch macbook pro which i got in the summer of 2010, and it has now just started to have the mouse cursor start moving to the left or right when i am not touching the track pad or the mouse i have connected is standing still. Also when i am typing it will highlight or automatically search words i have not clicked on, i have turned of the touch settings for the track pad but it still is very sluggish moving across the screen when i use the trackpad or it moves without me touching.

What should I do??