If you were still bfing this would be quite normal. As I understand you haven't been bfing for about 1 1/2 months? I would say that AF won't be too far away in that case - maybe give it another month or so to see what happens. I don't think it necessary magically starts immediately after you stop bfing - you will still be producing milk for a while so I think it would be quite normal for it to take a couple of months or so to return.