Want to drop A levels to pursue something else, about to go into year 13

Don't panic. Your parents should be somewhat aware of your lack of interest in the subjects you studied based on retaking year 12. The fact is if your heart isn't in it, then that's not your fault. If you're passionate about music and want to pursue that, then show them. I'd go about discussing the areas you're interested in, spend some time playing your instruments with them in earshot, almost like preparing them. Also look into other options to study music. Local colleges are a possibility and some universities have foundation courses that don't require A levels. Print a few pages off from some of these options and have them available when discussing your feelings about your future. Show them you have thought it through and that you have some potential alternatives in mind.

I'm doing biology,chemistry and maths right now. I have already completed year 12 and about to go into year 13. I don't feel passionate about my subjects at all and my predicted grades are awful. What i really want is to pursue a career in music, which is completely different from the subjects that I am doing now. This is because my parents pushed me towards doing subjects that would take me down the path of being a doctor or something. I already retook year 12 because my subject choices were already terrible, and i thought my second chance would be different but i was wrong. I want to do something else that would guide me toward a music career , but I dont know how to break it to my parents. They want me to go to university, so i thought doing music at uni would be the best option but seeing as im failing my A levels i dont know what to do. I just feel like im trapped in a small space without that many options.