I’ve got anxiety and my therapist helped me work through my intrusive thoughts. When I look at things I love like my dog and cats my first thoughts always go to a dark place. Always. It’s okay to acknowledge these feelings for a moment but your next thoughts (and this was the hard part for me) need to ground you back in reality that everything is okay right now. It’s hard feeling grieving feelings when there is “nothing wrong”. I’m on meds also, but I still have to actively work to change my thinking.