Okay so my boyfriend and I have unprotected sex every weekend . Each time he cums multiple times.. Usually around 3-4 times.. Sometimes in a day. So I'm often taking pregnancy test because I have no idea when I could actually get pregnant .. But lately my nipples have been real itchy and sore . & this morning I realized my nipple and breast look way bigger & veiny .. I'm a brown skin girl so my boobs don't usually have veins that I can see .. Is this a pregnancy symptom ?