I know it's a day away from your expiry day, but there's just one way to to look at it.
You still need that NOC. It's no biggie.
Get it here:
http://dgca.nic.in/public_notice/PN-medical%20NOC.pdf
Complete the form and speed post it to DGCA. You may collect it yourself or wait until they send it. Takes a week I think.