Pregnancy or pms

Kimmie
So my boobs have been feeling really heavy lately and my nipples are sore. Super TENDER! the slightest rub on my bra and it hurts. And they are always hard. Like I could cut glass or something. Af was do today but never showed. I took a pregnancy test and it was negative. We have been ttc. So what do you think? Pregnancy or late af symptoms?