1st day of work in 4 years went great, then I found out tonight my sons preschool is doing a…

1st day of work in 4 years went great, then I found out tonight my sons preschool is doing a Halloween parade tomorrow morning, I just may cry. I honestly dont know how to handle not being able to make all of his special events. I mean hell, last yr I was in class during his and talked my professor into letting me stand in the hallway for 45 minutes just to watch