If you don’t want to tell me that, my next step is to survey Black Hole, Duotrope and the Speculations Rumor Mill, and maybe Ralan’s, to see if there’s a backlog at that market, or hints of burgeoning deadness in its near future, or whatever. Because if the market is suffering through a lack of funding time, or if the editor’s mum just died, or something like that, I don’t query again–I leave it as long as I can, and withdraw when I feel I have to.

If I still can’t get a fix on it, I’ll use IceRocket or something like it to search for mentions of subs to the market, to see if other people are getting non-responses…

Mostly, I don’t worry too much about over-querying, because I’m just as reluctant to query as you, and I know that I’m not over-pokey. (Poke, poke, poke.) So… Hope that helps.