To be safe, wait a while longer before even thinking about redosing, or just don't redose at all. I recall roughly an hour long come-up from sublingual 25I-NBOMe and visuals didn't quite manifest until a few hours in, however I was certainly affected before then. Are you having any mental effects?
Did it come as a blotter or a liquid solution? Did you dose sublingually or intranasally? Did you notice any taste or numbing when you ingested the drug?