Something is wrong with my internet. Yesterday, my internet was working fine. Today, browsing is very slow and videos won't load. I rebooted my computer and restarted my modem. My ISP is Comcast High Speed Internet. My download and upload speed is very slow too. Is it possible someone could be pinging my ip address? I've noticed, when loading youtube videos, on the bottom left corner, there is an IP address. That ip address has changed, it would normally be 7x xxx xxx but now its 218 xxx xxx, an entire new IP. Can someone please help me? 

My Computer
System One
-
- CPU
- Acer T180
- Memory
- 1 gig of RAM
- Screen Resolution
- 1280x1024