Tips to help stop body armoring?

Has anyone else struggled with body armoring and found a way to stop? Even when “relaxing” i find myself keeping tense and stiff. It will take me a second to notice, but once i do, i realize my whole body is tense. my jaw will be clenched, my thigh muscles will be flexed tense, my calves flexed, my shoulders raised, my fists clenched, basically i just can’t naturally relax. Sometimes it is so painful i can’t fall asleep because i can’t get my damn body to chill out. When I have the time, I try to do progressive muscle relaxation to “regain” control over my muscles and consciously work them into relaxing, but it only ever gives me temporary relief. I’ll get my body relaxed and tension free…and then 2 minutes later realize i’m completely tense again. It’s exhausting. Obviously there’s no overnight fix, but is there anything else I can do to get my body to believe i’m not in danger?