(This may be triggering for some if you get anxiety over being calm)

Been in therapy for 3 months now for health anxiety and panic disorder. I really hate living each day in a constant anxious state when I'm not even having anxious thoughts to the point where my short-term memory is terrible and I constantly fixate on "reality" and my memories. Lately, I've been feeling calm and at ease, but this sense of calmness gives me anxiety. Does anyone else get anxiety from not having anxiety? I really hate this feeling because I feel like I'm a new calmer person, but my brain simply does not like that and thinks I'm going psychotic because I feel calm. It's like it's convincing me that I have a brain tumor affecting areas regarding personality or I'm in psychosis and causing me to act like a different person when really it doesn't understand this new calm person that I'm slowly trying to become. I simply can't stand the fact that my own brain is gaslighting me every day. Any advice or maybe even sharing your own experiences?