My hand rolled under my wrist 8 days ago. xray was negative. but, my wrist is still painful when i put pressure (not tender). should i get new xray?

Wrist injury: Not all traumatic injuries result in a bone fracture(s), but can result in damage to the cartilage, ligaments and/or tendons, which cannot be seen on plain film x-ray alone,. Also, some bone fractures are subtle. The best modality to evaluate the soft tissue structures for injury is with MRI. If pain does not improve or worsens, consult your doctor to assess the best course of action for you.

Pain: yes as the initial x-ray could have missed a schaphoid fracture. however the way you slept may not have caused it. if the second x-ray is also normal then you have sustained a sprain which will resolve,