Steering lag

My car has a very odd steering problem where the wheel can be moved left and right about an inch without moving the tires. This is not much of a problem at lower speeds but on the highway or speeds over 45 the play in the wheel is very loose. Let’s just say your arms get very tired constantly having to readjust just to stay your lane. I’ve tried looking other places but no one has had the same problems. It is on the lower side for steering fluid and I hope to fix that tomorrow but it seems like it is a mechanical problem in the steering column. If anyone knows anything that might help it would be greatly appreciated.