Am I overreacting?

My husband is telling me I'm completely overreacting. Our son is 14 and he walks to lacrosse practice 4 days a week. And we take him to his games on Saturdays. He walks there and walks home. Sometimes it runs long and he will be walking home around 8 or 9. He told us today he's been feeling like someone is following him. I freak out am ask what he meant and he tells me he started seeing a grey car and somebody was staring at him and the car would start to follow him, but stop whenever he got into the neighborhood. He said its been going on for several weeks now and he tried changing the way he went home and it worked for a few days but then he saw the car again on his new path home. There were a lot less houses on that path he was taking so he got nervous and hid out in a store. The car stayed outside that store for 20 minutes and then left. I asked why he didn't tell us sooner and he was like "I didn't know if I was being paranoid". I told my husband for now on I'm taking him to lacrosse practice and he is picking him up. I would have to take him to practice on my way to work and my by the time my husband is off work his practice should be over. But my husband starts complaining that he wants to relax when he gets off of work. I told him straight up idc. Thats creepy and he shouldn't be walking anymore. He says I'm overreacting and our son is being a pussy. He also says if he was being followed they would have done something the first night he walked home. He's really all upset about picking his son up. Tell me am I really overreacting? If my son is worried I feel like we should be too. I understand he's tired after work but it wouldn't be that long of a drive.