Dear aspirant!

You can still start to prepare for it . But the condition for scoring good score in emcet is that you have to follow a strict time table and study minimum 9 hours a day with full determination. You should practice previous year question again and again ,give mock test weekly and try to improve your score in every next attempt. You should build strong approach to the topic instead of root learning. You should practice a number of numerical questions. You are advised to revise the done topic again and again so that you don't forget them at time of exam.

All the best!