Replying to Dr. NS: SC Joint Dislocation?

Anyone ever had an SC joint dislocation or sprain?

A couple days ago, I decided to go back on adderall to help me focus at work. I popped about 5mg (I have a very very low tolerance for amphetamines). Long story short, I think the adderall caused chest muscle spasms, that combined with my horrible work posture, might have caused me to sprain or dislocate my SC joint.

At first my chest just seemed extremely tight and hurt when I took deep breathes. After a couple days it started to slowly feel less tight, but every once in awhile, it suddenly will tighten and be extremely painful. If it pull my shoulders back, my chest pops and immediately feels better.

I did some research and it seems to have something to do with my Sternoclavicular (SC) joint. Anyone have any experience with this injury or similar symptoms?

Normally, this type of thing is caused by extreme trauma so it seems fucked that I might have done it working on a GD computer.

/inb4 go see a doctor