Hello Sir

Your question really took me into the memories when i gave my boards in 2013(12th).

You know, i was null in class 11th topics. Just passed by hook and crook without knowing anything about Physics and Maths. You still have 4 months whereas we had a mere 24 days left for the exams.

Exams schedule were out and we were calculating the gaps between the exams. 5 for Physics, 3 for Maths and 7 for Chemistry. Mood was light as the gaps we had got. Days passed and the D-day was reduced to 12. Now we searched for some Teachers who can can clear our all the Maths and Phy Topics. Luckily we got one and from then we worked our A** off. 81% it was (including Hindi) 67(PCM).

So , there's still ample amount of time if your considering only boards.