Hello,


First of all don't worry and don't panic.There are lots of student who suffer failures but later on go and do something extraordinary and you can also do the same.Life always give you chances.
First of all you will have to give compartment exam for the subject you are failed and then you will pass in all the subjects
Once you will passing marks after appearing in compartmental exam and then will be able to improve your marks next year appearing in the improvement exam as a private candidate.

I hope this helps.