so i had sex around feb 10, and i havent had - so to speak -  period since. there has been twice that i thought i was getting my period, but they only lasted 1-2 days and there was very little blood. usually the more active i am the more i tend to bleed, but it completely stopped this time during recital. my breasts are very tender, which isnt an unusual thing before my period but it isnt due for two weeks. there's also been a lot of very white and creamy discharge recently. to the point that i feel the need to change my underwear multiple times a day. and every slight sound and light gives me a horrible headache. could i be pregnant?