Help Jason respect his wife's final wishes

Hi my name is Jason and I need help respecting my wife's final wishes. My wifes been battling lupas for 7 years. On March 6th my wife suddenly passed away unexpectedly. It was a normal Sunday evening. We were cuddled on the couch watching movies. I got up to put a pizza in the oven. My wife came up to me while I was in the kitchen and said she didn't feel well and she was going to lay down. Her last words to me was "wake me when dinners done". I said ok gave her a kiss and put the pizza to cook and set the timer for 30 minutes. I didn't want to bother I just wanted to let her rest. When the timer buzzed I took the pizza out the oven cut it up served the kids took a slice and walked to my bedroom to wake my wife. I found her slumped over on the floor. She never made it to the bed. I need help. I need help respecting my wife and her final wishes. I wasn't prepared to lose my wife. We planned on raising our kids together. We planned on getting old and watching our grandchildren grow up. I'm not ready to be a widower. I'm not ready to be a single father. Please I need help respecting my wife's final wishes.