Hello Sagar,
Since you are saying that you are going to give HSC improvement exam in July. Then it's result will come later. Till then all the admission  process for engineering colleges will be about half done. But don't worry you can apply for next year counselling. It will be beneficial for you. You can also give entrance exams one more time and improve your score. I hope you can understand and don't feel demotivated. Now, focus on your HSC exam and then you can apply for MHCET and many entrance exams.
All the Best for your studies.