I'm 49 years old and just had my first experience with pain in what i think is sacrum joint and possibly f2 or f3 area. The sharp pain comes from the f2 /f3 area but a weak feeling in the left sacrum joint. I have been very active with horses since child hood , I thought i was in fairly good shape,but after picking a horses'foot up then and letting it down,I felt the pain as I attempted to straighten my back,i went slow and finally made it up and to the house,a week later and not much has changed.Considering going to md if not better soon.What is next and what excercise do you recommend?