How to change stress response?

I won't say anything about your medication because it's not clear whether or not you've done this based on advice from the prescribing doctor.

One of the best things for stress is to develop good breathing habits. It's very simple, although you might find it a bit hard to develop good habits. 

A really simple but effective thing - the habit of responding to moments of stress by slowing your breath. The evidence showing that slow breathing is a fast and effective method of calming down is enormous. It's used in treating anxiety, depression, and PTSD (video - the Stanford PTSD study). Soldiers say that they are able to calm down immediately in dangerous situations by simply slowing down their breathing.

Rushing around when you don't have to and doing things carelessly is bad for the nerves and makes for mistakes and accidents. Carefulness is a form of mindfulness. Slow movement is your friend. It prevents serious accidents, and your actual safety is good for your peace of mind. You can learn relaxing tai chi exercise from one or two beginners' videos on YouTube.

Other things take some effort but they're very rewarding - things that make your life meaningful, like a good hobby, art, or volunteer work. Take care of your mental and physical health with the right lifestyle choices.

The best stress management is personal. Deal with things that are stressing you.

This has lots of useful information, about two psychiatrists who recommend a program of mind-body methods with attention to breathing and the lifestyle program for stress and depression developed at the Univ of Kansas.
    
https://www.youtube.com/watch?v=wqEM_jlDRZI

Dr Emma Seppala - amazing results with the Stanford study, good results seen a year later

https://www.youtube.com/watch?v=Uvli7NBUfY4 

You should not cut back on your medications without your doctor's approval and supervision.  This is probably your problem.

You should talk to your prescribing doctor about a referral to therapy which will teach you better coping skills.  Once you are taught these important skills, then you should work with your therapist and prescribing doctor on the idea of cutting back on medications....but not until then.

Orthodoxy = the only true faith; Roman Catholics tried one cup - one spoon ritual and got sick with Bubonic plague; if heresy enters Orthodox monastery then monks/nuns will get sick with flu/tuberculosis (for instance); Orthodox churches who closed for COVID or had disposable cups/spoons or dipped spoon into alcohol are no longer brides of Christ (now they serve Satan and honor Satan's new COVID religion). Don’t go into UFO to be “healed” by evil demons; demons never do good.