it is possible to test negative on both urine and blood tests and still be pregnant, although it is VERY rare... it can be caused by what is known as the prozone/hook effect where the
hcg levels are SO high that the tests can not read the results. Documentation has shown that diluting the sample at 1:10 and 1:100 will should return a readable result. Another cause could be something called masking /interference. This is when the woman has
antibodies to the hcg already circulating in her system which cause interference with the antibodies used in
pregnancy tests and the horomone becomes hidden or undetectable. Some causes can be previous exposure to mice, rats, or hamsters, or b12 therapy an even a few other things which I have not researched more information on. It is likely that the confirmation or ruling out of a pregnancy will have to come by way of a manual exam and
ultra sound. [I know about these things because I have experienced them first hand with my second pregnancy... 7 negative urine tests, 2 negative blood tests, and my internal exam was inconclusive, I couldn't be confirmed, but couldn't be discounted either. My
Ultrasound is Monday and I'm 3 months along... and showing. = ) ]
You know your body, trust your instincts and look up information one the things I mentioned and take it with you to your doctor. If she still won't listen, find a new doctor and take it with you until someone does listen. Whether this is a wanted pregnancy or not, your health is just as important at the baby's and you will need ample time to make a decision as to whether to raise a child or place it for adoption.
I wish you the best of luck. It's a very frustrating emotional roller coaster to ride without adding the flaws of science to it.