I don't usually masturbate regularly, but when I do, I end up with this annoying pain in my lower back that sticks around for like a week or more. If I happen to do it again before the pain goes away, it just gets worse. The pain's really bothersome, making it tough to walk or even lie down comfortably. I'm thinking it might have something to do with my prostate gland, but I'm not really sure. Could you help me figure out what's going on?