I had my tubes tied 3 1/2 years ago after my second child. At the time it seemed like the best thing to do because I kept getting pregnant on the pill. I regretted doing it immediately and my husband and I had just recently said it would be great to have another one. That's when I realized I'm late. Now I am 4 weeks late and having all the symptoms of pregnancy. I'm tired, my back aches, it's uncomfortable laying on my stomach, I've been feeling "fluttering" in my belly for over a week now, I've been sick to my stomach. I have taken about 10 home pregnancy tests and all are negative and about 2 weeks ago I had a blood test done and it was negative also. My doctor said she doesn't think I'm pregnant and not to worry about it but she hasn't done an exam or an ultrasound. In the past, pregnancy tests always showed up negative until I was at least 8 weeks along but she still insists it is probably something else. Could I be pregnant? I know it's a very small chance but what else could all this be?