Thing about Pilates is keeping body position, so a good instructor is key. With videos, it's easy to think you're copying the exercise but if you video yourself, it would look really different.
Sharp pains tend to indicate an acute injury. I would go get an x-ray, try your local minor injuries unit, if there is one. Otherwise, I think if you have a good local physio, it might be worth an MOT. So easy to get adaptations from falling, it knocks you about.
Richard Osman and his House of Games
Wedding Present Dinner Service.
Sudden pain in back of leg behind knee
My daughter is lying about me and editing me out of her life.
*Jane10 perhaps a different type of exercise - after rest?

wonderful ahahahaha