My internet is messed up how can I fix it?

Okay yesterday I logged into oneworldroleplay.com and I clicked on something that took me to a false log in page. (I wasn't logged in when I clicked on it.) Then suddenly I make another yahoo account to make a tester account for to see if it infected my account from getting friend invitations. Then after I made the other yahoo account my log in seal was missing so I made another one. Now when I go to the sign in page on yahoo the keep me logged in box is checked now! Then just today my hypster playlist on my profile the tracks buffer and youtube videos buffer a lot too. Is this just a problem with youtube or does my internet need to be fixed someway? Also is there a way I can make the keep me logged in box stay unchecked? If someone can help me out here with my problem I would greatlyappreciatee