I have not bred yet, so i am not a pro at all, but do not open the eggs I have heard it can take up to a week for them to all open.
I dont recomend it but some people will put a lil puncture into the egg to make it easier for the snakes to get out, but it would be to easy to hurt them. you can candel them to see if they are still alive, but other then that I know no more. Dont panic though. GL with your babies!