I took the exam a little over three weeks ago, and was told then (in the printout they give you after the exam is over) that it could be anything up to six weeks before I got a result. I have seen other people posting here who took more than seven weeks to get their result. I think it just depends on how speedy the person marking your exam is. So, I imagine prometric will tell you to just to sit tight and wait for the result to come through. I would not worry because I think a month or more is not so unusual to wait. Good luck with your result when it does come through.
Always proofread carefully to see if you any words out.