Hi Sobernunn,
Great job getting through day four, I also remember still being quite anxious around that time, and for the first few weeks.
It may be helpful to have a complete physical just to check in on how your overall health is, and if there is anything going on you can make a plan to address what it is with your doctor.
Google can definitely cause one to think they have any number of ailments!
Keep checking in and let us know how you are doing. I found getting outdoors and going for a walk helped with my anxiety.