Has this ever happened to you?

Still no period and boobs started hurting so bad over night. Tested negative yesterday morning. Could I have failed to ovulate during my first LH surge and tried again on CD 19/20? I’m 15dpo and usually get my period on 14dpo or morning of 15dpo at the latest. I’ve been feeling cramps for the last couple of days but no bleeding. Yesterday I had the tiniest bit of brown discharge when I wiped but nothing else since.