Milk drying up ??

Brittany • Mother to my little man . Wife to his wonderful daddy . 19 .
Ive been Brest feeding 8 months on the 15th. I'm 12dpo ... Not sure if I'm pregnant .. But my nipples hurt so bad when I'm nursing & my little man is fussing when I try to feed him . Like he's not getting enough . If I'm pregnant , is it safe to breast feed ?