Hey!
I completely get why you are feeling anxious, but I would try not to read too much into it yet. Firms miss their own timelines more often than you'd think (usually from things outside of graduate recruitments control), and delays can happen for loads of reasons unrelated to the outcome.
Whilst I personally haven't, I've definitely seen people receive good news after the original date they were given, so being a few days late doesn't automatically mean it is bad news. If you still haven't heard by later this week, there is no harm in sending a polite follow-up email.
Fingers crossed for you - I appreciate the waiting is the hardest part!
