Hi, Last month my periods started on 1st feb and I had unprotected sex on 23rd feb. Today on 1st march I have seen brown blood. My breasts are not sore but slight mood swings and cramps. Is it implantation blood or starting of periods?

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.