First speeding ticket for 71/60 but I wasn't going over 57. How do i fight this ticket?

I wanted to hire a lawyer but so many people have told me that I don't need one because I wasn't speeding I never went over 57. The state trooper was on the opposite side of a 4 lane hwy divided by a gr median in the slow lane while i was on the other side in the slow lane. I just don't know what to do..I've never had any other offenses on my license. and I'm a good driver. he went down the road and turned around and then followed me 4 a few seconds while I was going like 50.