hey u should not loose hope. Try solving rd sharma or rs aggarwal along with ncert textbook. For physics & chem ncert is the bible & then u can refer 2 together with or u-like books.
Try 2 solve previous years papers as mock tests.
READ & REVISE EACH CHAPTER THOROUGHLY & TRY 2 WRITE THE ANSWERS 2 THE FIVE MARKS QUESTION e.g. cyclotron,transistor as oscillator, in chem all the reactions & solved numericals etc.
I am sure these will help u a lot .