Confused about choosing a path in my career

After M.Tech, you might have gone immediately for an IT job. But you worked as a lecturer for 6 years. Generally, in the IT industry, many companies may like to take freshers and train them as per their requirement. Even for lateral entry, they like people to have experience in the field they have the projects. So you will face some problem in getting a good job.
There are many laboratories of central and state governments for R&D in various sciences. They will be recruiting scientists at various levels and some IT jobs will also be there in those laboratories. They will consider teaching experience also as experience for the post. So please keep watch on various government job notifications and apply for the posts which are suitable for your qualification and experience. You may be eligible for scientist' C' or 'D'.
Otherwise, there may be some small companies in IT where they don't get highly experienced people as their salary structures are less may consider your Candidature for a senior position in their company. I advise you to upload your CV on naukri.com and timesjob.com. Search for vacancies and apply for suitable posts.