I understand about doom scrolling. It definitely does not help but when trying to look for answers while waiting on Dr's and tests is not an easy path to escape. I send you big hugs. I have to be very mindful when I seem to be going down that path ... I pray a lot and ask for my mind to be cleared. Plus I know there's nothing good that comes from negative thinking. (Although at one time or another we all do it). I take deep breaths and tell myself I can't control or change whatever is concerning me right this second and ask for patience.
Are there follow up tests in the works? Are there any that can be done to get the answers you are seeking? Do you have a good relationship with your Dr's? Hopefully so so that you can talk with them about potential tests.
I'm considering some bio feedback therapy myself to hopefully help my brain to change my path of thinking and learn how to not overthink. The anxiety of every medical thought or decision is unhealthy for me and can make things worse as well.
What do you do for yourself to relax, be still and find calm and peace in your day? Again, big hugs 🤗