Issue: Profile reset

Hi, I'm not sure what happened but just earlier today I got a birthday notification and points even though it's not my bday. I checked my profile and everything disappeard, my cards, my points, my posts, my friends and the groups that I joined, it's like my whole profile was reset. I'm pretty sure that this wasn't the case last week, so I was just wondering what happened and what should I expect?
To e honest, I haven't really read the updates so I'm not sure if this was to be expected, please advise me of what to do, thanks.