On march 9th I got my period it lasted for 7 days. My boyfriend & I had unprotected sex on the 12th day & other times also. 3weeks later on the 1st of April I experienced getting a dark brownish color discharge sometimes with a bit of blood & cramps also. What could this mean?

Had you had recent intercourse just prior to the discharge? Could be irritation from that. Might be due to a pregnancy... might be just a shift in hormones.

You could try a pregnancy test and see what you get. If it is negative, see what happens when your next period is due and test again at that time if need be.

Please see J_9's wonderful thread :https://www.askmehelpdesk.com/womens-health/do-you-wonder-if-you-pregnant-78869.html

Blood tests can detect a pregnancy earlier than a home pregnancy test. They can detect it about 7-12 days from possible conception.

MRS.S