I called my mum and she couldn't remember the name except she did say it was something "ocosis" being the ending.

I then looked it up and found a name called "proctalgia fugax" but that doesn't seem to be related to only when you have your period which mine does and so does your's by the found of things. My mu said thats not the name for what she was told she had.

Apparently there is not treatment as the attacks are so quick that by the time you take something for it it is gone. The only thing I can suggest is ponstan which is also a drug they use for after birth pains and period pain. Ill go look see if I can find the name for it again or else eventually I will ask one of the Dr's at work when I don't have a thousand other people around to hear me ask. What ever it is it bloody hurts that much its awful. Where you off contreception for long before conceiving with your first two? Maybe thats why you have only just noticed it. I only have it when I am not on contreception and its very bad. Some months are worse then others also.