It could be a UTI (as we call them in the U.S.) which is a Urinary Tract Infection. I would recommend seeing a doctor to confirm this but one thing that usually helps with a UTI is drinking lots of Cranberry Juice as well as lots of water. I think I had one before a long time ago and I just drank Cranberry Juice and I was fine but if it's bad enough or keeps hurting, please see a doctor so as not to jeopardize your fertility or your health in general. Take care!
Im not a doctor or anything, but this has happened to me before. It was the cause of a Urinary Tract Infection. If you dont get antibiotics it will most likely get worse it can also move to your kidneys if its not treated. Go see your doctor! And Drink Cranberry Juice, or take Cranberry Pills you can get them over the counter at a pharmacy.
Jade
sounds just like a unrinary tract infection... see a doctor to be prescribed some anti-biotics