Welcome to eHealth. First, is there a reason you are having UNPROTECTED sex? My motto is if your're gonna dance you gotta pay the fiddler. Or, is it you are ready to start a family? Gonna say to you what I've told my own daughter. You take a chance of getting pregnant everytime you have sex....PERIOD. Not every birth control method is 100%. I stopped taking hte pill when I decided ot have my dauughter. I was off hte pill for almost 3 months. I had hte exact symptoms you are describing, no real period but the brown discharge and then the light faint pink blood. My suggestion to you, if you have not had a period since February, I'd suggest at least wait until the end of this month and if you still have not had a period, go to a family planning (health clinic and getting a pregnancy test). Or you can pay out the hoo hoo and get a home pregnancy test. No one here can say' "hey, you are pregnant", but there is ALWAYS that possiblity, when you are NOT using protection....Hope this helps!