<human>: Can you condense the text into a few key points?

I am hoping to get some feedback from people as I'm torn on what to do.  I have 2 cats that are brothers, nearly 11 years old.  A few days ago, one was very lethargic and not eating - I took him to the emergency vet and they kept him for 3 days.  Last night, they sent him home with me and told me that there's nothing they can do to save him - it's only a matter of time.  They wanted me to have the last few days with him before I have to make the decision to put him to sleep.  His kidneys are failing and he's got a heart murmur which is getting worse as a result of the fluids they've been pushing to try and help the kidneys.  Essentially, I have about 48 hours left - just as long as the fluid they pumped over the last few days begins to filter out of his kidneys and they can no longer function properly.  I've had him since he was only a few days old and I live alone in this state.  I got him about a month after moving here in 2004 and he and his fur-baby brother been my family - the only thing that has remained consistent in all my time here.  

The issue is that I am an active member of a volunteer organization that sometimes hosts presentations and speeches.  I'm scheduled to give a 5 minute demo meeting speech tomorrow (to a group considering creating a club).  I have been an absolute wreck all week and I know that tomorrow or Friday will likely be the day I have to decide to euthanize him... but I'm afraid if I cancel, people will think less of me or consider me weak.  Is it ever ok to cancel due to the loss of a pet?  I am just trying to get an idea of how I should handle things... should I just "suck it up" and deal with it, honoring the commitments I've made?  

Thanks for any advice!
<bot>: My cat of nearly 11 years will have to be put down in 48 hrs, will I look bad for canceling 5 minute volunteer speech tomorrow?