I had actually forgotten about this but at the height of my drinking I worried incessantly that my husband was going to be killed in a car accident or have a heart attack and die. Mine is older too and does have some potentially serious health problems and I used to lie awake and worry myself silly over what might happen too him. This definitely went away with stopping drinking and I haven't worried like that for ages- it was awful, no way to live. I would definitely stop drinking and I am sure you will start to feel a lot calmer.