Okay, So My Beast Have Been Very Sore, Not Just

Okay, so my beast have been very sore, not just right now, but also when I have my last period. This is weird to me because I have large beast and I have never had pain in them before, also its mainly my actual beast hurting, not really my nipples. But I have noticed they've gotten darker around the ring of my nipples, and the veins and showing more. Is that normal? My period last month was 6 days early, it wasn't too heavy, well it started off light, barely any blood, then it stopped for almost a whole day. Next thing I know the next day I'm bleeding again and this was a little heavier. That lasted for about 5 days. I went and had a pregnancy test done and it was negative. But I have been keeping track to when my boyfriends cum stays inside me and none comes out, and it happened twice on the last two days of my period. I haven't had a miss period yet, but then again, they have been so off I never now when to expect to start. I haven't felt nausea or anything, but I more then always get lightheaded when doing mostly anything. I feel like I'm never full, and all I wanna do is eat. I've been sleeping maybe 12-14 hours at night and still wake up tired, and tired throughout the day.