Help... could I be pregnant or is it just stress?

Hello,

I was scheduled to start my period yesterday, and I’m really always on time maybe 1 day off if my cycle is changing but I’m freaking out... I have been stressed with my new role at work and we used a condom every time we have sex... I’ve been extremely emotional, my breast are so soar and my appetite is bigger than ever before not to mention I’ve been exhausted.

If I don’t get my period by tomorrow morning I am going to take a pregnancy test.

What do you think the chances are...?