sore nipples

i think i ovulated later... idk how many dpo i would be. but my app says 12dpo tomrrow.. i had blood work drawn on 28th said i didnt ovulate i think i ovulated after the 28th.. my nipples are sore... and im getting negative pregancy tests i think its early or idk what going on. usually sore nipples has always been my first pregancy sytm..