help.

I had unprotected sex a day before I got my period, it was right on track when it showed up the day after having sex.
I have a regular menstrual cycle,  not on birth control, nor any medications.
its been over a months,  and I'm currently 5 days late on my period.  I took 4 pregnancy test the second and third day I was late, but shown up negative,  could I be pregnant?  

[Dr. Kokil Mathur]

Hi!
If you had unprotected sex just a day before your scheduled periods and your periods came on time, then you are absolutely safe. Unprotected sex just a day before the periods cannot result in pregnancy, unless you have irregular periods or irregular bleeding between periods.   Periods may have got delayed due to hormonal changes or because you are stressed out. Wait for a week. If you do not get your periods, either repeat the test or go for a blood HCG estimation. Take care!