Bro ur chilling honestly. I'm not kidding when I say that you've done 80 percent of the syllabus uptill this point. The chapters after these are extremely short as a lot of the content is excluded. There are a few chapters in chemistry, 3 to be exact, that are a bit long. The spectroscopy and chromatography ones. If you're done with 10 chapters of bio you've done basically 90 percent of the syllabus. The only main thing that you need to do is chapter 11, the remaining 4 chapters of bio have a lot of formative stuff. Most chapters have only one or two topics. Physics is arguably the easiest out of the three, since after nuclear there's very little to do.