Welcome to the forums! Thank you for taking such a brave step in sharing this with us. It takes a lot of strength and courage to reach out, and we're so glad you've done so. You've come to the right place- this is a safe and non-judgmental space, where you can give and receive support from others who have/are experiencing something similar.
I'm sorry to hear that you're having such a tough time right now. It must be really scary and confusing to be having dissociation alongside your somatic and anxiety symptoms too, but not know what's causing all of it. Unfortunately, I have not experienced this myself so I can't offer any advice but hopefully other members of the community will jump in and share their experiences.
I just want you to know that you don't have to do this alone, we are here to help and support you through this difficult time. Please let us know how we can best support you, and feel free to update us on how you're going if you feel up to it.