Anxiety over a job opportunity while on disability

backstory: I'm on disability for fibro, anxiety, and depression. I fought long and hard and for a really long time to get on disability, and even though it doesn't pay a ton, I still liked the idea of not working because it makes it easier to manage myself. All this being said, a job opportunity was presented to me, and now I'm waiting for a phone call. My anxiety level is so high right now, it is unreal. All I can do is stare at the phone waiting for it to ring. Time is moving so slowly. I'm really hoping the job pans out, it's a really exciting opportunity. The job itself would be really rewarding, and it would be nice to bring in some extra money. But the anxiety.