5mm nonobstructive stone in right kidney: watch and wait?

30F: I saw my doctor for a follow-up regarding an ultrasound last November that showed a 5mm nonobstructive stone in my right kidney. She still wants to watch and wait, but I’m having such immense anxiety and every little cramp or twinge of pain sends me into a spiral. I have heard such horror stories about the pain and vomiting (I also have emetophobia, which doesn’t help). Am I overreacting? I have been chugging water as usual since then, but I feel like I would have felt something if it had passed.