Hi Mears and Bobs,
Attila's right, I'm afraid (hi, Attila!) - even if the buscopan works, you do need to be taking this seriously. Severe pain is not normal, and research has shown that 70 to 90% of teenagers with this sort of pain are positive for endometriosis on laparoscopy. A lot of gynaecologists are still very ignorant when it comes to teenage endometriosis, and will tell you that it's very rare. It isn't: American research showed that almost two thirds of adult sufferers had the first symptoms as teenagers and 40% (off the top of my head) had their first symptoms before they were 15. The research also showed that the younger a girl began symptoms, the worse the outcome tended to be, with a much higher chance of severe disease (bowel or bladder involvement) and infertility. The obvious conclusion from the available research is that it should be taken very seriously when a teenager is experiencing this sort of pain.
I'm not listing all these stats with the intention of scaring you - just so that you will, hopefully, read up about it, keep a close eye on your daughters and hopefully get them to a gynaecologist who knows about endometriosis. I know I've got a huge bee in my bonnet about this. But I have reason to. If it's not taken seriously now, there is a chance that your daughters might end up like me. By the time I was in my mid 20s my endometriosis had damaged my bowel so much that it affected mt bowel control. I found it a very humiliating experience. I was also pale, thin and ill as a result of not being able to digest food properly, and I was frequently in pain and chronically tired. I had to have part of my bowel removed, among other things, and have been left with problems. I have to control my diet carefully and am on laxatives long-term. When I found out that the evidence on teenage endo is so strong and has been around for decades, I felt rather let down. I can still remember the frustration as a teenager of trying to get people to understand just how serious the problem was. But my family didn't take it seriously enough, and to my doctors, all the signs that there was something seriously wrong were outweighed by the one factor - my age - wwhich caused them to ignore things that should have been ringing warning bells. I have now had good surgery and have got used to living with such problems as I still have, but will always wonder if I might have been helped by earlier diagnosis.
The saddest thing of all is that my experience is not rare. Please, please don't let your daughters end up like me.
Have a look here and here (showing the results of a schools outreach programme in NZ which led to a three-fold increase in the diagnosis of teenage endometriosis).