8 days no period, doctor did blood work they say negative. Could there be something wrong

Before I got on the pill, I would miss my periods as well. It could be caused by many different factors: your diet, stress levels. Plus any exercise would help regulate your period.

But the best thing is wait another week and take another pregnancy test, if still negative- go and see a doctor for advice and not just blood work.

OK thanks I will wait another week and see what happens