A couple things I forgot to mention...

1. I have High-speed cable internet through Charter

2. I use a Netgear Wireless router. The downstairs computer hooks to the router which is hooked to the modem.

Also, just to rule out this possibility, I stayed at a friend's house yesterday and took my laptop, and my speed was perfectly fine, so I highly doubt it is a problem with my laptop.

As of now, I have changed my mode to B and G and changed my channel to 11. I have checked the internet a few times with Speedtest, and there is much less instability and my speed is consistent around 11. There are still a few peaks and valleys on the tracker thing on the site, which is to be expected, I'll bet. It is, as a whole, 100% better though. Thank you for your help, guys. If it messes up again, I'll be back XD