Am I cooked?

My A levels just came out, and I got a BCC on my composite (maybe I should've given oct/nov, I know). I easily cleared 1st list cz you know it's O lvl and SAT based. It looks like I should be fine but I would like an ITU ball knower to advise me if I should retake. A friend of my mom warned me that A level matters a lot and that's a little scary. Jazakallah khair