Is it just wishful thinking?

Well, my last period was on October 26. It seemed shorter than usual. I have my tubes clamped (since in 2004 I had gotten a divorce and thought I was done). I have since remarried and now want a baby. Maybe wishful thinking, but I am 5 days late and have taken about 4 HPT and gotten a BFN! I get really nauseous with different smells. I also have been super emotional lately.I usually get the typical PMS moodiness and cramping..but this is weird. I am hungry alot, but certain foods don't sit with me well. I typically don't get heartburn much..i have had it almost daily! My breasts are typically tender about a week before i am going to start, but lately they have been feeling just tingly, sometimes it feels like they did when nursing (letdown). It could be that I am just wanting a baby so bad that it's in my head, or did i really get lucky and my wish may be coming tru? Has anyone experienced a pregnancy after having your tubes tied/clamped??? I am really anxious to know!