Ovulation or implantation cramping?

I had my period the week before Christmas. Hubs and I had sex on Christmas. I am on birth control.

I ovulated yesterday & I started cramping two days prior and am still having some cramping. My breasts are tender as well.

I know it's waaay too early to take a test, and it's highly likely that it's just symptoms from ovulating, but do you think I am pregnant? I usually do not have ovulation cramps this long - usually a day at the most, so I find this rather concerning (although I'm probably just overeacting). I haven't seen any spotting.

Thanks in advance!