Hello Thanks for query . Based on the facts that you have posted it seems that you have sustained trivial injury to Tunica Albugenia during sex which is very common in woman on top position . I would rather say that you are lucky not to get fracture of penis . You need to consult qualified Urologist for clinical examination and get ultrasound scanning of penis done to assess the extent of injury . Take anti inflammatory medication like Diclofenac twice daily for 2-3 weeks . It takes 2-3 weeks for complete healing till then ensure not to have any sexual encounter . Dr.Patil.