You are not alone. There are specialists who are part of a post icu and recovery clinics across the country who may be able to help.
You are correct you have experienced a trauma and you are both trying to process that experience, heal your self and recover your cognitive brain function. But the medical insurance system is not good at checking underneath the hood of a seemingly normal and healed body. Check out the thrive website and learn more.
By posting and sharing your story and asking for help you are doing the important work
Keep it up