I too have suffered for a long time from generalized anxiety disorder. I am also in my early 60's. I have been feeling better for the last several years after much therapy. I am currently taking sertraline and buspirone. I've been taking anti-depressants for over 20 years. What has helped me the most is to realize that my anxious feelings are not real, they are just anxiety caused by my negative self talk. Once I became aware of what I was telling myself, I realized how that was making me anxious. I was also very afraid of my anxious feelings, due to years of anxious suffering. Now, I find that when I start to feel anxious, I try not to fight it or be afraid of it. I try to tell myself, "Oh, there's some anxiety. That's ok. I can feel it." I also try to figure out what I have been telling myself that has disturbed me. Usually, I realize that my negative self talk is distorted, and not real. All of these things help me to not "panic," if I feel anxiety, which keeps the vicious anxiety loop from beginning. Believe me, I do still have some bouts of heavy anxiety, for example, when I flew during Covid. I think once you've had anxiety and you find some relief, you get uncomfortable with feeling better and you become hypervigilent about monitoring for symptoms and anxious feelings. As strange as it sounds, even as painful as anxiety can be, it is familiar, and feeling better takes some getting used to.
I know I will never not have anxiety again, but I'm hoping I can weather it better with my new insights and strategies. Hang in there!