I Have Damaged My Rotator Cuff, Possibly A Tear. I

I have damaged my rotator cuff, possibly a tear. I cannot raise my right arm to any degree without experiencing extreme pain. It is also painful almost constantly otherwise. I have ever had an injury of this type. I do not have health insurance, and cannot afford MRI or otherwise to determine the extent of the damage. Is it possible this will correct itself over time? Today is my third day of difficulty, and the pain has been constant.