Your beer may have some carbonation, but more than likely it's not fully locked in yet.
Watch poindexter's video from my bottling blog.
Like he shows several times, even @ 1 week, all the hissing, all the foaming can and does happen, but until it's dissolved back into the beer, your don't really have carbonation, with tiny bubbles coming out of solution happening actually inside the glass, not JUST what's happening on the surface.
I wouldn't worry about it. Just check back in 2 more weeks and see what's up.