Internet is acting up?

[Ames 1138]

Okay, so for the last few weeks, my internet has been acting ridiculous. When I am browsing the internet it will just randomly decide to stop working for a few minutes, and the url will say "waiting on [insert website name here]," before eventually connecting to the website. Additionally, I play online games and the games will freeze constantly. My server lag will drop to about 10k ms before going back to 20 ms, then 10 seconds later it drops back to 10k. This is annoying when I am using a VOIP as I get disconnected from that and the games servers constantly, one time about 10 times in a single hour. I don't think it's a problem with too many users on at once because most of the time I am the only person using the internet, and I will still get problems at say 12 am. I have not downloaded anything that would slow my pc down and I clear my cpu's history every day. Also, another computer on the same internet has similar problems, so I don't think it's a problem with the computers. I've tried disconnecting and reconnecting to the internet, restarting my computer, resetting the router and modem and nothing has changed. What else could I try to fix this?

[Boss]

Call your ISP.