Ortho Tri-Cyclen Lo and time frame

I've been on ortho tri-cyclen lo for 4.5 years, and I haven't had any negative side effects. I can't blame any weight gain on the pill, because over that time frame I've been able to lose weight by exercising and controlling my diet When I slack off from exercise or eating healthy, I gain weight--sounds pretty normal to me. Also, I used to have problems with cystic acne, a few a month but enough to make me self-conscious and now (at 28 years old) my skin is what I consider perfect. I don't have to wear make-up to cover anything up. I also I started Proactiv at the same time though, so I'm not sure which one is contributing more to the skin clearing up. I was thinking about switching to Loestrin 24 FE, but I guess if it's not broken....