Is it early pregnancy symptoms?

Hi ladies, i may be overthinking but was looking for some answers,
but i had my fertile window this week mon-fri and had sex wed at my peak day of ovulation aswell as every other day in the fertile window. 
Yesterday and today im feeling very nauseous, bloated and sore breasts. Im next due on in 10 days and dont normally get period symptoms till 4 days before.
​Do u think it could be the start of something?