How far along pregnant can you be and still test negative on an at home pregnancy test?

Question

I am convinced that I am pregnant and have tested negative on two early response tests, but I have morning sickness, shortness of breath and breast tenderness...all the signs (I know my body).....What can I do!? To catch this problem before it becomes to far along! Many places are refusing to give me a sonogram, unless I can test positive on early response! (yikes) I am terrified!....I have been pregnant before and I have every sign possible. I have heard of women testing negative for months before finding out they are pregnant.......How common is this? Is there any time distance along that this would become impossible?

Answer 1

I would wait til you are supposed to start your period and then try taking another test.  Is the "problem" you are referring to the pregnancy or testing negative??  I would call your doctor and express your concerns to them. Good Luck!  

Answer 2

I tested every other day, and did not get a positive until I was 2 months pregnant.  Even the urine tests the doctor gave me came up neg.