Speeding???

So I got a speeding ticket today! We were picking up Lars' sister Mimi from the airport and a cop started signaling me to slow down. I was NOT speeding at this point, just coming up to a slower speed zone, so I was annoyed that she was telling me to slow down. I did slow down and we eventually stopped at the curb to get Mimi. Well the cop came barreling down the road and when she got to my car she rapped hard on the window and started screaming at me! She insisted that she signaled me to pull over and she was crying too! Clearly it was going to do no good to argue with her so I just shut up. but it was very strange. I would never have intentionally not pulled over if I had thought that's what she wanted. ANd I'm certain she lied on the ticket, she said I was going 39 in a 15! First of all it wasn't a 15 yet, but I was certainly not going 39! I was basically in the airport lot at this time. It was very odd that she was screaming at me, and that she was crying. Obviously she had a bad day and decided to take it out on me. I have NEVER had a speeding ticket, I just don't speed! I did get a ticket for failure to come to a complete stop when I was 18, but that's it. Oh, and a ticket for running a red light (total accident!) at a signal that had a camera. I don't even know what happens when you get a ticket! Can I dispute it? Does my insurance go up? ANyway, welcome to Annapolis Mimi! Sorry your arrival was so eventful!