L.B.
This is a very framiliar situation. I had this scare about a month ago after having my tubes tied 1 year ago. I am not pregnant though. For me it was stress. It may have to do with breast feeding; I know my sister had missed periods when she was breast feeding. I wouldn't buy a pregnancy test since I doubt that is what is happening. I would talk to a doctor if you have any worries, but the tubal ligation is VERY protective. Hope this helps.