Hello,
Generally, blood tests tend to be more relied upon up to 8 weeks of the pregnancy, with ultrasounds being more useful after this time. So i wont advise to skip a blood test(Beta HCG) .
Click here to read about Beta HCG.
Well regarding accuracy of HPT , it depends on when the Test was taken .If they are taken too early than they are 85 % in accurate in detecting pregnancy . If they are taken one week after missed period they are more accurate.
But especially for your case with repeated negative HPT and symptoms of pregnancy the Best Answer is a Blood Test Beta HCG.I would suggest to skip an ultrasound but not a Beta HCG.
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