Hi there,

First of all you do not need to take so much pressure. Be calm and relax. If your syllabus is not completed yet then there is no problem. But now you have to do little bit hardwork. You need to complete syllabus in such a way so that you can also practice previous year question paper. It is good that you are saying you will practice paper yourself.

But you should also give exam of your coaching as it will helps you in uunderstanding level of exam and you will know how much you have prepared . It will seriously help you a lot. May be you will get low marks in your coaching exam but it will motivate you to score well in your boards . These mock test are conducted so that you can know your preparation. If you will not give this exam then you will be not able to know your mistakes. So you should give this exam.

Later on you can give this exam again after preparing whole syllabus and then can see your improvement.

But at now you should not fear from exam and should give it.

Hope it helps you

Good luck!