painful urination, Now its almost 2 weeks

Hi, I am 19 years old, female. I've been having this painful urination ever since 14/03/2012. Now its almost 2 weeks. I thought it was normal because i ever had the same thing previously which was last year and it only last for a week. But, this is not normal to me because I've been having this for 2 weeks and it makes me go weak, no appetite to eat, regular stomach ache, body cramps. Sometimes, its hard for me to walk too.. Can you advise me?