I think i got virus

uhh i think i accidently deleted avg i put avg to trash bin accidently and i forgot to take it out and i delete my trash bin with ctrl+shift+del so that deletes all from comuter i think and now i download a autoclicker and i think had a virus on i donwload antivirus again and i researched its says clear but my cpu is aroun %20-30 without using anything only google chrome and please help me