I'm a week late. I tried a pregnancy test (serum). It was negative. How else can I tell if I am pregnant?
The blood test for pregnancy is probably the most reliable test, so it is highly unlikely that you are pregnant. Did your doctor say anything about the results or if you should re-take it? Was a reason given for your late period?
I would consult with your doctor on this and especially to find out why your period is overdue.
Thank you for your question.
Home Pregnancy Test
Possibly. It can't be determined over the internet. Are you saying a doctor administered a blood test?
There are a number of reasons for your period to be late. You can read about some of those in an article written by Merely Me, a writer and community leader for this site, titled, My period is late! Reasons other than Pregnancy for a delayed period.