These are familiar fears that follow a loss. It's OK to feel them, but, to the degree you can, don't believe them. It's OK to feel nothing. There are times when you'll have no feelings of any kind. It's OK to feel anything.
All feelings are part of the healing process.
Let yourself feel. Let yourself heal. I drive away, tears in my eyes. Bugs commit suicide on my windshield. I drive away, nothing in my eyes.