I have sore nipples but my period doesn’t come for 7 days

Im not on the pill anymore and my boyfriend finds it hard to cum with a condom on so I usually let him give me a creampie, he doesnt fully cum in me but some could go inside of me. I’m only thinking im pregnant because my nipples are so sensitive and that only happens when im 2 days away from my period but this time im 7 days, would it be because of my period though?