A towerful of mice: I messed up :/

As you can already tell by the title , I delivered the Annabelle's remains to Graham.. I don't have previous saves to go back to.

Now guilt and regret has been eating me away for the whole day. Not only I failed to give both of them solace , i also caused death to innocent people by releasing Annabelle.

And now I am hearing that apparently I'll hear sick people coughing and witness disease and plague all over Velen from now on. If thats true then idk if I can continue. Should I restart my 30+ hrs playthrough?