When I started using the pentool today for my portrait I had no problems. I don't know if I hit a key but when I click for a new point the point does not go exactly were I put it; it goes a good couple centimeters to the right. Then when I try to curve the line it seems laggy, everything else is fine except for my pentool. Even when I saved it from CS5 to CS3 the first time I had no problems.

Help please, Thank you.

Also I noticed while playing around with it whatever I do the lines are perfectly straight I can make a perfect box no problem.