It's ok, I know you were just trying to help. Maybe you could take the egg to a rescue?
I don't want you to get pinched for having it and get in trouble is all.
2 and a half days is way too early.
Are you legal to have this egg? Can you post a pic of just the egg? It probably will not hatch due to the crack, even though you patched it right away. Bacteria still gets in. The only time I've hatched cracked eggs was when I applied natural nail polish, wax...