Suggest Remedy To Make Skin Tone Even

Hello, My name is Kala. I am 21 years old. My question is about my uneven skin tone. I have always had it, although it has gotten slightly worse in the past year. I have gained about 18 pounds in the past year, I weigh 138 now, whereas I stayed at a healthy 120 since my sophomore year of high school. I was always active in school, but since graduating in 2008 I have not been. I am about 5'3, nothing wrong in my medical history. My acne problem is controllable, nothing too serious, But I HATE how un-even my skin tone is. I think part of it is that I am very light-complected. I am a redhead, but I don't have freckles and I am not as pale as most redheads are. I think I have combination skin, I don't know if that could be what causes my blotchiness? I don't wear makeup 99% of the time, so I feel like it's not being irritated and I've tried hundreds of cleansers that have no effect on my skin tone. What would you reccommend??