Out of control boobs

NikNak

So AF is due on 30th and even though I get swollen fun bags around this time my nipples are constantly on edge and feel so sore as if their grazed for the last two days. Relying on my sports bras as normal under wire bras are so uncomfortable to wear. Hopeful for baby number.1 to be conceived soon as we've been trying since September. Just wondering if the abnormal nipple feeling is a pregnancy symptom or AF is just being a b**ch this month.