i just finished my first pack of bcps and had unprotected sex throughout the entire month. when it came time for my period to come i only had a bit of brown discharge, but only when i used the restroom. i didnt even need to use a pad. usually i have a heavy 5-6 day period. its been 2 weeks since this happened and i have had cramps like i am going to start my period and sore breasts since 2 weeks before this "period". also i am having a very hard time staying awake lately. could i be pregnant?