Should I take a blood test after 1 week late in my period and 3 negative pregnancy tests?

Hello, Menstrual cycle delays are common and should not worry you. If your cycle is usually regular and you have no symptoms other than the absence of periods, you can do pregnancy tests every 2 to 3 days for a few more weeks without worrying. If your periods have resumed and the pain has improved, you don't have to worry.