Car pulling when switching gears
 

I have a 2000 Honda Accord 4 cyl EX VTEC Automatic Transmission. I might be imaging things but it seems like the car is pulling or working hard (not sure how to describe it) when it switches gears. You can notice it when you turn corners or sometimes when you accelerate gradually. Would an oil change fix this or is this something that someone knows about and how could I fix it?