Sharp pain in left nipple!

Lindsay
I'm 9dpo and the past couple of days every now and then I'll get a sharp pain in my nipple. My boobs are big and sore but they always are before AF. Has anyone experienced this and got a BFP!?  I'm on Clomid this month of 100mg and my progesterone level on day 21 of my cycle was 45! What's going on? Thanks!