Hello Ananya,

Your pcm percentage is around 68 and according to jee guidelines 75% is required in pcm or you should be in top 20 percentile. Now for IIIT A , jee mains cutoff is approx 180-200 marks . 

Apart from this fact you just prepare yourself for exams and find you possible opportunities next year. But without 75% in pcm it would be difficult to get into nits or IIITs . But I can get into other good colleges like RVCE which is very good college in Bangalore. Placement are awesome. Almost equal to some nits ,nearly all big companies visit campus etc . Also requirement is 50% in 12. You have to give comedk and get rank below 1000. Similarly BMS college in Bangalore. 

Some private engineering colleges also take admission according to jee marks.