About 4 months ago, I lifted a bin that was too heavy. I twisted to the left and dropped it to my knee. I held it there yelling for help. About 2 minutes before someone finally helped. Since then, I have had a sharp pain in my thoracic spine that radiates to my right rib just under my breast. I've had X-rays, a CT scan and an MRI. All negative. I'm at my wits end. I'm in so much pain, especially when I exert myself. I'm getting sick of taking medication. I can't even do the dishes without having to medicate afterward. Someone please tell me what this could be. I've heard possible herniated disc and also rib subluxation but all scans say no. Please help.