Your doing well @Yellow_Daffodil. Keep breathing deeply. We all understand that anxiety and your human. It's normal to catastrophise initially and worry. However that worry and what ifs don't change anything.
It's a process and at this time all you try to stay in the present moment. Big breaths help that as does being busy, walking or anyone you can get absorbed in.
At night when I woke up (still do) I sometimes either read or listen to a podcast. My mind would wander sometimes but then I would get back to the reading etc. At night try something other than lying worrying.
It is great you got checked. Look after yourself and let us know how you are going. Best wishes