I don't know how to lose weight!! ): please hellp!! with tips?

I am 5'1 and 125 pounds. I don't know how healthy that is but the problem is that i have shorter legs and it makes me look stubby. :( i want to lose weight on my legs REALLY bad... and arms. Everywhere really..! I do swimming practice for school 6 days a week for 1.5 hrs but i havent lost ANY weight. :( ughhhh i don't get it!! i just want to feel confident. I don't care how fast it is, it can take months, but i just want a change. Please help...?