Sounds highly suspicious. I assume you have 2FA on? (2 factor authentication)? If not you really should.
Any spouses/relatives that you know of that would have knowledge of your password?
Back in the day I used to share an Apple ID with people that lived with me and we’d use that account for our Apple TV purchases for the Apple TV downstairs. Every now and then they’d forget the password and lock it out requiring me to re-set it. Now days with 2FA sharing accounts is difficult/near impossible – and there’s no need to with family sharing (what I use now).
