Oh boy I’ve been there as I mentioned in a previous post. This is where things get tricky because you think everything worked out and then there’s that terrible silence. To be honest, yes you should leave it at that. There’s a multitude of reasons why they haven’t gotten back to you and for all you know you could hear back tomorrow. Give it some time, like a week or so and if there’s still no answer then you may need to find somewhere else because I think it’s inconsiderate of people to not give any sort of response and you have to think if that’s the type of person you want to work for.