3 days before ovulation, unprotected sex

I had unprotected sex with my husband three days before ovulation according to 
my app. (Sex-8/8 ovulation according to glow on 8/11) my period is due according to glow 8/27. I've been feeling nauseous a lot lately, and have uncomfortable cramps. Being that it's only been 11 days since the unprotected sex what are the chances these are pregnancy symptoms?