am i preggy?

hi! i'm anxious and stressed if i'm really pregnant. my last period was december 23 and it ends at dec 27.. and also we did at that day raw. i'm a 24-26 day cycle and based on the app, my ovulation day is january 2-3. now i'm having symtoms of dizziness and sometimes nauseous since last week (jan. 10 up today). it is really possible that i can ovulate in advance like on the day 7-9 of my cycle? coz if i based on the calendar, the day we did is still on my unfertile days (day 5). i want to know your isights, folks before i'll take a pregnancy test if im conceiving or i'm just stressing myself.