Wireless Internet Woes?

So at home we have wireless internet and I use it. I also take my computer to college and use the wireless internet there. But lately at home my computer never connects to our network properly. It says that it connects to the router with ''limited connectivity''. After doing some more digging I found that my computer sends packets to the router, but it's not recieving any packets. This used to happen every once in a while, and I would be able to reset the network card on my laptop to fix it, or sometimes unplug the router and allow it to boot back up. But lately I am unable to resolve this issue at all. I can plug in via ethernet and that works-but I don't have a cord within reach in my room (I may need to move one). I've also been 'stealing' signal from a neighbor that leaves there's unsecured. No other computer at home has this issue-only mine. I am quite computer saavy but this one is stumping me. Any suggestions???