Sore nips

I can grab my breast and they are fine . But when I put a lil of pressure on my nip it hurts. Before playing with my nipples turned me on now they are sensitive. I'm 1 day late. I've been nauseous for 5 days. Headaches backaches I've been stressed. And SO came in me on the 10 of Nov . Do you think I'm pregnant or is my stress causing all this stress has never done this and neither has a "period on its way" if there is one coming.