My wife and I arrived at Newark Airport (EWR) USA on 25th April 2018 from India.
We both went through the Immigration checks such as fingerprints, scanning, etc. The customs forms and both passports were returned. On checking the passports at home, I found the B2 entry is not stamped on my passport, while my wife's is. We planned to return back to India by the end of May 2018. We are senior citizens.
What should be done now so that we do not face any problem while going or re-entry next time in USA?