I Woke Up Out My Sleep 7 In The Morning Throwing Up For Hours and i had brown discharge

So Me &My Boyfriend Have Had Sex Almost Every Day Up Into My Ovulation Day And After I Ovulated On The 3rd Of December And Expected A Period On The 17th I Got It On The 19th It Only Lasted Two Days And Was Heavy The First Day So I Thought Maybe I'm Not Pregnant But The Second Day I Had A Horrible Headache My Breast We're Sore And I Woke Up Out My Sleep 7 In The Morning Throwing Up For Hours Seemed Like I Had A Brown Discharge But It Was Only For A Day ....Could U Be Pregnant And Still Get A Period I'm So Confused And My Doctor Just Got Deported Someone Help