HI Shelby,
Welcome! I hope you find help here. I'm sorry your here tho, because that means your in pain.
Have you seen a dr. about this? it's really hard to say what it could be without any kind of exam. Did you do anything that may have caused this pain? a fall, move the wrong way, anything that could have pulled a muscle?
Maybe a call to the dr. if it persists or increases in pain or area that it covers.
If you can give us a lil moore info perhaps we could give you a lil idea wht it sounRAB like it might be. But like I said it really is best to get to a doc and get a professional opinion.
Please keep us updated as to what is going on.
I hope you find answers soon and your pain stops.
God Bless
Carol