Forgot

I am having my final exam in may 15. Till now I am done with FR, SFM, AMA, ISCA, AUDIT. Still I am left with DT IDT LAW. feeling little tensed whether I can finish it or not as I did not go for classes and did not study earlier. After doing isca I am feeling that I forgot what I studied in remaining sub. and I can't remember Is a also wat to do. please advice... Thanks in advance