Over it. AF 3 days late, nausea and BFN

Hailey • 29 from Brisbane, having no. 2 (only 13 months after no. 1!)
I don't understand what's going on with me. I'm usually perfectly on time for AF, but now I'm three days late and getting cramps, nausea, dizzyness and sore nipples.  But BFN this morning.  I did start taking Vitex this month so that could be making me late but why all the symptoms? Surely I would have gotten a BFP by now if that was it.