You either get bitter or you get better. It's that simple.
You either take what has been dealt to you and allow it to make you a better person, or you allow it to tear you down.
The choice does not belong to fate.
It belongs to you.
So... your worst case scenario has actually happened. The one thing you have spent your life making sure would never happen to you.... happened. NOW WHAT? You have always been hyper-vigilant in your quest to keep this particular scenario at bay, not once did you think of how you would handle it if it DID happen. It was always just the fear and dread of it happening that took precedence. It doesn't really matter, you can't prepare for something as devastating as your worst-case scenario. You don't know how you will react until it happens.
As always there is a reason why these things happen, this is a message. The message is: you need to take a look at your life. You have a lesson, my friend, something needs to be re-examined. You now have the opportunity to take a look at your beliefs and your actions and see what needs some fine tuning.
The key word here is 'happened', it has already taken place, you can't change it. In fact, it probably happened because you worried about it so intently. What you think about you create. You will find that it is a relief now that it has actually happened, you can stop worrying about it. You manifested this for your own growth. There is no room here for bitterness, or self-recrimination, no one is out to 'get you' quite the opposite, this is to help you become a better person; and believe me, you will.
Your worst-case scenario is a blessing in disguise.