Birth control pills?

I'm 18 years old and I'm not sure if I should start the pill. I'm a pretty bad anemic, and usually my flow is super heavy. I also have acne and I've heard that along with its main benefits, the pill can clear it up. Or atleast help a bit. Also, I heard some rumors of side effects of the pill, and was wondering is it really true? The weight gain, ease/loss of your flow, sickness, ect. I know everyone's body is different but I was just curious and wanted some insight. Help?