WHAT IS REALLY GOING ON?

So I've had sex a few times during my fertile week no big deal. I was doing my best not to think about getting pregnant. Any Who, I don't normally notice PMS symptoms but this one is different for me. I've had sore breasts before but this time, not so much but my nipples just hurt 😣😣😣 and it's been that way the last few days. Now today I'm nauseous. Idk what to think but I still don't think I'm pregnant. I'd love to be but... ijs! what do y'all think?