I am 28 years old and had my tubes tied in 2004 after the birth of my 4th child. In the last two years I have been pregnant 12 times. I just took another positive pregnancy test and this time I have no cramping just some light pink spotting. I am of course worried because I have not carried a baby since all this has happened. Doctors aren't sure why I keep getting pregnant and I dont usually make it to high enough HCG levels to see where the baby is. This time seems different because I have had a lot more of the symptoms and I haven't had any cramping at all. Any ideas?