I am SO sorry, hon... That had to be terrible to go through. It was brave of you to post about it, and I certainly hope that no one's going to go through a lecture at you.
It sounds as if you tried to handle the problem to the best of your ability...and there's no guarantee that a vet trip the first day would have been able to save him, so try not to beat yourself up about it.
Drop me a PM if you ever need to ramble, Okay?