I've had extremely sore and red nipples for the past 3 weeks, and my next period isnt expected for another 9 days or so. Me and my boyfriend have had sex almost every day for the past month besides during my last period and maybe 3 other days throughout the month. Could this be a sign of pregnancy? I also stopped birth control about 3-4 months ago, however my periods have been kind of irregular so I don't know if I even ovulated. Please help!