First off let me say I have the worst anxiety..
For the last few months (could have been longer) I have the soft rubbery lump on my collarbone, the only time it changes in size or hurts is when I touch it all day while im having my Panic moments. But after leaving it alone for a few days it goes back to its regular size of about a marble. I'm seeing my obgyn next week, But I'm freaking out just thinking about asking her about it. I'm a 28 year old female that smokes, and I have endometriosis. Also Its about in the middle of my right collarbone.