lisalisa - firstly I am so not a qualified homeopath yet - but I will quote you from the myriad textbooks I have.
secondly, homepathic remedies never work against the symptom of the disease, but help to strengthen your own body so it can get rid of them - but don't underestimate the power of your own body when it is properly stimulated by the correct remedy. But you need to get the remedy that matches as many of your symptoms (particularly emotional and mental ones) as possible - it's not like an exact science of this remedy cures this condition.
Ok.
Kent (v. v. important homepath) has \link {http://www.homeoint.org/books3/kentmm/cina.htm\this} to say about cina - if it sounds generally familiar you shoudl find that the worms clear up v. quickly.
Tyler says cina works particularly on people who have restless nights, grinding of teeth, dilated pupils, boring in nose and anal irritation. She also suggests a non homeopathic remedy - smear your anus liberally with Vaseline - you have to get right inside. Apparently worms come out to breed, and if you are well lubricated they can't get a hodl and so just fall out before reproducing. (Only on Mumsnet could I type something like that)
Any news on the OC? Or was the itching all down to the worms?