Hi deliquesce, Welcome here. You are definitely allowed to post here. This is not just a forum for DID, it is for all dissociative stuff. I'm glad you posted.

As far as your situation, I'm so sorry. I can understand how distressing that is. Do you have a friend that can go with you to help you stay grounded and be there for support? Maybe that would help and they can be there to help you stay grounded afterward as well. Also, it would help if something happened as they could explain what' is going on for you if you wanted them too.

Maybe also, taking something small and safe that you could hold in your hand might help you stay more present. Or take a bottle of cool water to sip on might help as well. Do you have any anxiety meds that you could take prior or can you talk to your doctor about getting some specifically for the test?

Good luck with this. Please keep us posted.