Breast pain on clomid

How long and when did you experience breast pain after taking clomid? I am 9dpo and have been having a lot of breast/nipple pain and tenderness since about 3dpo and it got worse around 6dpo. Hoping that means I'm pregnant because I'm only on day 25 and don't expect AF anytime soon. My last cycles were 40 and 50 days long. But I guess it could just be the clomid. Just wanting to know others experiences as well :). Thanks!