Good luck! I think it's worth investigating how to obtain US citizenship certificate. You never know when you can get asked for that in the future. It's much more solid proof for some things, especially if your mother loses her documentation proving how you are a citizen. Or when she passes away and you won't get all the papers. Technically, any time in the future, like 30 years later you may be asked to reprove how you are a US citizen when renewing passport. At that point you'd have to find the same docs your mother used to get you a passport OR just show the citizenship certificate.