I was suspose to start my period 5days ago and i took a pregnancy test but it didnt come back positive?

Positive test: If you are sexually active then there is a possibility you may be pregnant. However to confirm this you will need to see an obstetrician to do blood work.The earlier the better.

"Late period" ?'s: If your periods have been regular (24-32 days apart), a delay in onset may result from stress (emotional, work, etc.) which can delay the onset of menses. Wait a week, and if no period begins, obtain a serum HCG pregancy test to be certain about pregnancy. Ask your gyn physician about low dose oral contraception which will be 98% protective.