Dear Concerned., Thanks for writing to us. As per the history there seems to be nothing major /grievious injury in your case.The pain increases during sitting due to Paraspinal Muscles Spasm . However please do , X-Ray AP and Lateral of Neck//X-Ray Lumbosacral Spine AP and Lateral//USG abdomen and Pelvis. These X-Rays will rule out Spondilolisthesis//USG-Abdomen-Soft tissues and core organs - injury in abdomen//. Only if any positive reports are noted,then go for CT/MRI et al. There after Lumbosacral Belt Support//Bed Rest//Not bending or lifting weights//Anti inflammatory will help you recover faster. Wishing you a speedy recovery. Best Regards., Dr Lt Cdr ASN Bhushan.