hello I'm 20 years old and me and my boyfriend have unprotected sex a lot we use the pull out method not safe I know. But I am on birth control and this month a couple of weeks before I started my period I having cramping which I didn't think anything of but this week on Wednesday I was suspose to start my period and I didn't. The next day Thursday I started having brown discharge then that night I had a tiny bit or red. Now Friday I have brown discharge still with a little bit more red blood but not very much I have been wearing a tampon but it doesn't get anything on it. I am just wondering is this a sign of pregnancy? I've read about implantation is that what it be? Please help me out :)