I just found out that I am pregnant with my second child. During my first pregnancy the doctor told me that I am O-neg and that I have an antibody present in my blood. He told me that things would be fine with the first pregnancy but it could carry complications with future children. I dont remember if its D or E. But I am about 5 weeks long and am curious if I should be worried. I dont see the doctor till 11 wks. Do i need to speak with my doctor to have test done or wait. He didnt give me any information during my first pregnancy and i'd really liked to know.