Calendar hacked

I was reading an article on safari and clicked a link. The link was not to what I expected so I quickly closed that tab. Noticed after that my calendar for today is now full of warnings such as “clean your phone”. I did not create these events. I looked online and people suggested that I might have signed up for a calendar that when I clicked the link. I looked under setting and calendar and do not see any calendars I do not recognize. Does anyone have another idea?