good day to you! i've been very worried of what is happening to me right now. i usually had my regular period. but, on this year, i there were 2 or 3 months when my period were delayed from 5- 7 days. then after that, here comes my period. this situtation erases my worries for i know that if a period came, i'm not pregnant. last month(november), my period has not come. its been 12 days already. should i be already pregnant? please help. is there any instance that i only have a missed period and that i'm not pregnant? what should i have to do now? please consider my situation. thank you very much....