Hello, I would be happy to help you with your question.
If you were pregnant right now, you would be about 6 weeks along. This usually correlates with a very high HCG level. So given that the blood test
was negative, then you are NOT pregnant.
There are many reasons for a delayed period (thyroid disease
, etc). These could be tested for in addition to an ultrasound
given the lower abdomen / pelvic pain
in the setting of your delayed period.
I hope that this helps. If you would like a more detailed or prompt answer, please consider the PREMIUM SERVICE! Good luck!