Need to add multiple subdomains with LetsEncrypt?
maybe Certificate for WWW and non-WWW?

do a dry run, to test it

./certbot-auto certonly -d originaldomain.com -d www.originaldomain.com -d new.originaldomain.com -d new2.originaldomain.com -d new3.originaldomain.com –dry-run

I tested it with apache2 works great!