I am 21 years old and sexually active. I am three days late for my periods and usually I have a cycle of 28 days I had sex 9 days before my period date with protection. I have taken pregnancy tests thrice which is negative. I am getting very anxious and stressed because I haven?t got my periods .Please help.

Suggestions offered by doctors on Lybrate are of advisory nature i.e., for educational and informational purposes only. Content posted on, created for, or compiled by Lybrate is not intended or designed to replace your doctor's independent judgment about any symptom, condition, or the appropriateness or risks of a procedure or treatment for a given person.