Wireless Router behind Wired Router

Hello,
My question is this...I have always had my pc plugged into a wired broadband router. I now plugged a wireless router into one of the ports on the wired router. I set up the wireless router not to broadcast and set up the stronger security (not the wep). Should I worry about someone hacking my pc that is plugged directly into the wired router? I am only using the wireless router for my laptop.