I'm not sure which day I ovulated but according to Glow I am 8 days past my most fertile days. Since about day 3 of my fertile days I've had really sore, tender and firm breasts, very similar to what I get during PMS. I've never had tender breasts during ovulation. My nipples have also changed a bit. They seem to be always erect. My husband has also commented on how big my breasts look lately. Does anyone know if this is due to pregnancy (we had unprotected sex 3 times right before my fertile days), or could it be from a hormonal change due to age, or taking prenatal vitamins, or any other reason out there?