Should I have called the cops? ...or was I just being paranoid?

I was on my way home from the store last night when the pickup truck ahead of me turned off onto a "U" driveway of the residence across the street from my neighborhood. I thought he was just going to turn around to head back the way he came. Nope. After I passed by he proceeded on in the same direction he was already going, except now he was behind me. This isn t something that normal people do...which creeped me out. I mean who pulls into a driveway like that and continues on in the same direction? Even creepier when he followed me into my neighborhood. I passed my street (Rule 1: Never go straight home if you think you re being followed) and kept going. He turned off onto another street so I thought he was just going home. I went a little further then turned around and came back towards my street. I was 1/2 way to my street when that same truck passed me going the other direction. Once he was almost out of sight I mashed the gas and quickly turned down my street without signaling (illegal in Texas). ..then shut down the car and my iPod so the light wouldn t attract him. I quickly headed to the house and when I got to the front door I could see him creeping down the next street over. I don t know if the pickup driver lives in my neighborhood or not. ...or if I was just being paranoid. Opinions?