I have a regular 26 day cycle.my period is 1 day late, took test in the morning came back negative. could i be pregnant still?

Pregnant?: Home pregnancy tests are not always accurate at "one day late", so if your period has not started, wait another week and get a serum HCG test to be certain about pregnancy. Your cycle may be "late" because of delayed ovulation secondary to stress, and not pregnancy.

Pregnancy test: If you had sex since your last period, redo the home test in 3-4 days. If the result is negative, repeat in 4-5 days. Unless you get a period.