I had my last periods on June 9th. And simce it got over till last Monday me and my boyfriend have been doing things like fingering and oral sex but we haven't had any intercourse. This month my periods is supposed to come today according to the Flo app. But 4 days before the exprected period date I started getting light brown discharge. It is still brown discharge. I've no symptoms like tender breasts, back pain amd abdominal pain. Should I be concerned about pregnancy?