<s>[INST] Here is what I am going thru. I took a home pregnancy test 4 days in the early morning and it was a clear as day positive. I then went to the health department around 3 pm and had another test done and it came back negative. The nurse said it was bc my urine was VERY diluted and that if I got a positive early that morning then I am pregnant. She then told me to go to the hospital and get a blood test done and I did that. Well to my surprise it also came back negative. I talked to the chemist who processed my test and he said to trust the HPT I took that morning bc it is nearly imposible to get a false positive on those. And he said my body is probably not producing a lot of the hormone. He also said he had a woman who came in every month to get a blood test and her test did not show positive until she was 7 months. I also read online that a woman did not have a positive blood test until she was 6 months and it showed that she was 6 weeks. I feel as if I am pregnant.. I have been have symptoms for about 2-3 months and my last normal period was sometime in june... July I bled for 3 days and in August I bled for 2 days and spotted for 2 days... So my question is... What is the likely hood that the blood test was wrong.. And should I trust the HPT bc I thought blood test were typicallly more accurate! [/INST] Hallow Dear, I believe the blood test you got performed was Beta Chat Doctor test. This is very sensitive and specific test which can give reliable results even few days before missed period. This is the most reliable test. It is very unlikely that this test will give false negative results unless there is human error in performing the test. Since you had performed HPT on overnight first morning urine sample, you got it positive and later samples reported negative as early morning first urine contains higher concentration of Chat Doctor hormones. I would advise you to perform one more pregnancy test at home on overnight early morning first urine sample. If that reports positive, you should consider yourself pregnant. For reliable confirmation, ultrasonography performed 8-10 days after missed period will provide you direct visual evidence of pregnancy. If your HPT is positive (or weak positive) and ultrasonography informs that the uterus is empty, you have to consider the possibility of pregnancy elsewhere outside the uterus (ectopic pregnancy). This is a very serious condition which may land in bleeding emergencies. Hence, in that case please report to your Obstetrician ASAP. I hope this clarifies the issue.  </s>