Thanks for writing in.
I would suggest that you repeat your urine pregnancy
test as it needs to be done 1 week after you miss your period. Please use the first morning sample for the same.
Sometimes, periods do get preponed or postponed by about 1 week. This can occur due to anovulation
etc. However, if you are not pregnant and this occurs again, please see a gynaecologist for a proper evaluation.
Hope this helps