Neha,
People choose to do MBA at various stages of life, and find suitable schools as per their requirements. As long as you are inspired to grow, and learn new things in life, please go ahead. I definitely think that your work experience is on the higher side. However, the academic world is getting more and more creative, and these schools are coming out with a variety of programs every year.
As long as you stay committed to taking GMAT, and the future you are keen on post MBA, someone in this world will pick you.
Fall of 2019 will be tough if you have not taken GMAT yet. Most of the second rounds are in January, and that means, you should start working on the applications tomorrow morning. As you do not have a GMAT Score yet, I think you should be targeting Fall 2019, and Jan 2020( Richard Ivey for example has an MBA starting in January) and their first deadline will be around March( Check exact dates).
Hope this helps.
Jatin
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Aarushi
MBA Consulting Team
PythaGURUS Education