Sheila faulkner

I need some help. I've been vapeing a 6 Nic and wanted to go a little higher so I bought the same flavor in a 3 Nic, I can't tell any difference except it doesn't seem as strong as a 6. Can someone please help me fix this, at least so I can get a little higher than a 6. Stupid I know but I bought 120mils and don't want to waste it. I mixed the two together in gorilla bottles. Thankfully I haven't ruined it all. Can someone please help me where I can understand how it works?