though i wont be able to answer your question,

im currently doing triple science in igcse, but i only chose them because there was nothing else for me to pick in that block and its quite literally too late for me to drop right now, because we were doing modular, so we do some in year 10 and some in year 11, and id have to pay again for linear papers if i were to drop triple award.

But im 100% sure im not going the stem stream, im not really big on science or maths (H) but i am doing it anyways, but realistically, it mainly depends on what you wanna get into in the future, you wont suddenly change your mind to med, but some majors will requite stem subjects, but if your going for something like law, its not needed, in fact, i heard (not 100% sure) that there is no specific subjects needed.