pains like hemorrhoids after sexual activity

Hello ! i have a very scared problem. After we finish sex ,i begin to feel very hard pains from the back like hemorrhoids .it is not happened every time but once a month/2 month and ONLY after sexual activity. The pains are very hard and pass after 15 min. approx Do you what could be the problem? Thanks

Hi TOR No i don't think the pain came from your hemorroides, it could be your prostst gland i sugest u consult with an Urologist Dr' Waizer