Brown discharge before BFP?

Did anyone have brown spotting before a BFP?

I am 14 DPO and AF was due today, but only light brown spotting and my boobs are noticeably sore.

While it could just be PMS, I do not usually have sore boobs before AF. Typically only very hungry and crampy, but not this time. Only a little bit of brown spotting, sore boobs, but BFN.