Could it be?

Ok so I had my tubes tied in August after being pretty much forced to (long story) but ever since having them done I have been super regular on AF. Same day every month. So I was suppose to have started on the 4th but I didnt. And I still haven't. Could it be possible that I'm pregnant. I mean I tested and was a negative bit with my last baby it took me until about a week after my missed period to get a positive.

**EDIT**my tubal was the filshie clips so my tubes are still connected just blocked I guess you could say.