I don't like driving either, and do it out of necessity. I agree that the change in your life is probably what has caused you to lose confidence.
Are you otherwise well?
Can you share your concern with DH - would he be helpful?
I second getting a 'confidence boosting' lesson - I know several people who have done this.
Useful tip if you don't want to share with anyone else - this is something I do every so often, to keep me aware 7 alert as a driver:
go out on your own, begin on familiar ground, and narrate your driving as if you were talking to an instructor "I am going to turn left, I look in the mirror, am aware of a car some distance behind, I signal, I look ahead, glance to the inside, .......I see traffic lights ahead, they are green, I take my foot off the pedal, aware they may change, I check the cars near me...."
Keep going as you take a slightly less familiar route.