How do you deal with the waiting and loss of control?

I am in the early stage of my diagnosis. I am so drawn to the internet to research then end up going down "worst case scenario" rabbit holes... I guess I am feeling a loss of control and I don't know how to regain my feeling of control. I NEVER expected breast cancer...we have no family history of it so silly me, I thought my breasts were safe.

Any advice on how to wait for information without driving myself bonkers? Also, how do I regain my feeling of control after my body betrayed me? I find myself on this cancer train and there's no way to get off...