Jakers

Hello, About 3 days ago my internet has dropped from a consistant 15 mbps download and 10 mbps upload to 1.4mbps download and .90mbps upload. I havent the slightest clue as to why this is happening. I know its not the network because the other computers in my household are getting the 15 / 10 mbps. I dont know if something has burnt out or if something is about to go. I also just wiped my computer and the problem still persists. Any help will be greatly appreciated. Thanks, Jakers