Don't be disheartened you are very good student. Other than PCM subject you can opt for courses like BBA+MBA , BCA+MCA ,Courses on GIS ,IT ,Computers,Biotechnology etc where you dont have opt for PCM.
And above all you will be placed in good firm and get handsome salaries as well.
Company's like Wipro for example takes BBA/BCA candidayes on average packages,make them do PG in Ajim Premji University ,free of cost, and hire themselves in the company with handsome salaries.
So my suggestion you explore more take help of teachers,elder brother or sister or counselor like me.
Be happy always life is to cherries . Kudos and thank you