That's an incredible sequence of events in such a short time. I'm so sorry for your loss. My heart goes out to you in this time of sorrow.
I too have been dealing with similar issues recently. My father passed away on 3rd of April at 85 and if that wasn't enough my best friend of 15 years was diagnosed with terminal brain cancer and was given 6mo to a year to live.
Fortunately I was able to spend quality time with Dad in the past few years as his health began to fail him and for that I am grateful. He was doing just fine and then all of a sudden he left us in a fleeting moment. Dad was a professional baseball player for 20 years....and of all days to pass....you guessed it .....Opening Day of Major League Baseball. Guess they needed him upstairs to fill out their roster!
I also feel fortunate that my good friend and I have some time left before he passes as well. You can bet I will spend as much time as I possibly can with him before he leaves us.
You are right you about tomorrow could be too late! Invest the time with your loved ones now!!
Take care and find comfort in those close to you in this time of need.