Could I be pregnant?

I am 6 DPO and for about a week I noticed my breasts have been very tender, not so much swollen but look they look fuller. And today I noticed greenish blue veins on my breasts. I've also been nauseous throughout the day. My husband and I had sex on May 13th and he actually ejaculated inside of me without a condom, the reason why he ejaculated inside was b/c it was the last day of my period and I was only lightly spotting and we thought it would be "safe" we had sex while I was ovulating as well, but he did not ejactilate inside. 
 Could these symptoms mean that I am pregnant or hormonal? I should be starting my period in 1 week