I need help connection problems

[Terraria]

Ok I have a connection problem and I accidentally downloaded something wrong trying to watch the videos and it ruined my connection like fucked it up so I went to tell people so I did a malware check while that was happening I had to back and forth so I put +forward and -left and then just picked up a pistol holstered it smiley told me to drop it and he said pick it up again you die he told me to stand still and he gun planted me and tried to kill me wit it and so I just did kill in console and went to spectate like right now I'm just lagging by typing. so could anyone tell me how to fix this?

[CyberMC]

Either you have a virus or you were being hacked 

[Chezit]

throw your computer out a window fix all our problems