Stage 1,2 or 3 while on estrogen inhibitor?

maryland

I'm having a new unfamiliar pain on my back between my shoulder blades, get worse with exercise, been going on since just before Christmas, probably pulled something but it's got me a little worried. I've been on Arimidex for 5 1/2 years. My MO retired last year so I got an appointment with a new one next week. I haven't had a bone scan in about 4 years so I'm hoping she'll order one just for my piece of mind.

What I'm wondering is how many of you ladies were taking an estrogen inhibitor at the time of your discovery of Metastasis? I'm just curious about the odds of metastasis while on it, can only find info on those that stopped taking it, then developed metastasis. Thank you!