I m having pain in the lower left side of my rib cage. I went to the er. All they wanted to check was my lungs for a blood clot because I have factor v clotting disorder, which I knew it wasn t a pe. Then they sent me home. Still with pain and no answers. Said it s a rib injury, although I ve done nothing to injure them and the pain is only in a small round area. Should I just let it go and be satisfied with this answer.