Chrome PopUp, can only click "ok"

A

AC Question

Hello guys,
Got my G4 recently and I am very new to Android
So when I was surfing the web using Chrome, I bump into a website that show popup ads and only "Ok" option available, so I just keep clicking "ok" and "ok", sometime my phone vibrate and there's few times it also download some file and went to my 'Downloads' apps, but I didn't open/click the files, will my phone got virus or any prob?

Btw, I immediately download file explorer app and delete the files inside the 'Downloads' folder, but the file still exist in 'Downloads' app. What should I do!?

Thank youuu