Based on this thread I was going to go in and setup 2 factor. I don't remember ever setting up the security questions and the first thing it did when I tried to setup 2 factor was ask me those questions. The questions it asked were not ones I would have chosen... at least on of them "What was your least favorite car?" and the questions that I do use didn't accept the answers I commonly use No signs the account was hacked, but the questions were screwed up.
I went to contact support and discovered that all the devices that it listed were mostly old devices. There were 6 newer iPhones, iPads, and an Apple Watch that weren't listed. Forgot that this has to be manually added. So I added my 6s Plus and then was able to get to someone on the phone in about 2 minutes. Because I was logged in, and on my Mac, she was able to do two quick things with my account and device to verify I was me and then she reset the questions. The whole thing took about 5 minutes. It is making me wait to setup 2 factor for a while for a couple of days. I received an email to that effect, so if your account is hacked I'd think you'd be getting emails as the process si going on. I got several from just what I changed.