It hurts under my belly button, on the sides of ky belly button and two fingers below my belly button. It also hurts under my sternum throughout the day. I recently missed my pill 5 days before my period i also had sex 2 days after i missed my pill. But then 5 days later i had bleeding which seemed like a regular period since then i havent had unprotected sex and i hve been taking my pill and should go on my period this monday. But what could the pain be ? It has been there for about 5 days.