Woman, nipple/breast/chest pain in pregnancy, all experiances please?

Okay so between may 16th - 24th me & my bf had unprotected sex about 8 times, and i am noy trying to be pregnant, but we wernt thinking at the time, i think i may have got pregnant from the 21st, i WAS ovalating and we had sex twice that day, and he came alot in me, and it lasted about 45 minutes. But took a test on june 7th, around 2 weeks later, too soon probably, but it came neg so i got the depo shot, but i felt bad cause idk if it would show up in 2 weeks, today about a month or so later, my breast hurts kind of in between, maybe heartburn.? And my nipples are sensitive and sore feeling, they are a dark pink purple color and i cabt stand wearing any bras but it hurts to not wear one too, is there still a chance of pregnancy.? Other than breast, i wake up kind of nausuas and lightheaded, and ive had mood swings more emotional, oh and theres like dark vains on my nipples but there light on my boobs.. Anyone experiance this.? Let me know, thanks