I took the pill last year to just skip periods when I wanted them, as I was sick of the pain and monthly headaches accompanying them.
I took it on the first day of my period as instructed, and the period was probably the worst i've ever had. I felt so sick and in so much pain. Usually i'm only in pain for 1-2 days, but this was for 10 whole days. Then I continued to have spotting every single day for the entire time I was on the pill, which was 7 months until I finally gave up in frustration and disappointment.
So if people tell you it's normal to spot for a whole month and it'll go away? Well, it probably will but it might not. Mine never did.