Do i still have a good chance? Please help!

<p>Hi everyone :)
So, i'm in a high school outside the US, our grading system's a bit different i think, but i've basically usually been an A<em>/A student. However, this term, i've been extremely undecided as to my A Level subject choice and that has really slowed me down, as i haven't been concentrating or studying much. My grades have dropped from A</em>/A to about a C. I've finally decided on my subjects and am ready to work and get my grades up, but now i'm really worried this will affect my chances of getting into a good university. I'm doing A Level further maths, maths, chemistry and physics, i do dance (ballet, jazz, modern), i'm a Yearbool literary manager and my school's Youth Against Poverty club president, and working on a school renovation project with this club. Is that enough?? What are my chances? I've worked really hard before this point and am terrified that even if my grades go back to normal, my transcript would let me down :(. Any advice, help would be much appreciated. Thanks.</p>

<p>*Yearbook, sorry.</p>