hi. my boyfriend and i always had protected sex. we did everything right and we made sure that the condoms are not damaged or expired or anything like that. we had sex over 3 weeks ago and im worried coz i still havent gotten my period. my menstrual cycle is fairly regular but i dont keep track. sometimes my cycle takes up to 35-38 days. my last period was on the 26th of october and until now i didnt notice any spotting which usually happens to me when im about to have my period. im stressed out so i took a pregnancy kit today and it was negative but i read somewhere that its still not reliable unless you missed your period for two weeks. im confused. could i be pregnant?please help. thank you!