personally when i have been the amani in this situation, the pain isnt immediate, its more of a slight discomfort like you feel stretched out almost. the pain shows up after a day ish and then its mostly in the legs and hips, also somehwat in your actual like vagina. kind of like a weak period cramp but slightly different. thats just my experience, but im pretty sure if it hurts your back instead then the guy probably did it wrong