Creighton told BBC Radio Wales Breakfast: "If that happens, it's not bad is it? I think it's absolutely astonishing, in all honesty, to go two promotions back to back and now are we dreaming of a third? Is there a chance of a third? I think there is, at the moment, from what we've seen so far.
"Whilst we're not always pretty, we always seem to find a way to grind a result out, and that is a sign of a really good side. So if we can keep doing this… if you can get through the busy Christmas period and into the New Year, and you are still there or thereabouts, we've got a great chance. And that is astonishing to even say."
Creighton didn't believe his former club even stood a chance of promotion when the season started.
"I said 'no, I didn't' straight off the bat because we were almost running before we could walk, but we're still sprinting, which is brilliant for us," he added.