Unsure if early pregnancy signs

Stacey
So when I ovulated last Sunday (04/06) 
In the 3 day lead up my temperature rose, I had the sticky clear watery cervical mucus, 
My partner and I Bd twice a day (just to make sure ;) ) 
I'm due for my period Monday, 
But since ovulation I've developed migraines & headaches (which I never get) 
Feeling a bit light headed every now and then 
Had a sore belly feeling quite sick the past few days 
And have a white creamy cervical mucus at the moment, which I generally have none in the days leading up to my periods.
I do have pcos and have been in a regular cycle now for 8 months! 
Any advice would be awesome or am I just over thinking it haha