My husband and I have been ttc for about 3-4 months now. AF isn't due until Dec 11th but I have been having major nausea, cramping and headaches for about 2 weeks now. 1 week of cramping before AF is normal but with everything else I just feel weird. Today I thought I would take a hpt and its negative :( I don't know what to think  I want a bfp. I will retest later, I'm just really confused as to why it's negative when I feel like this month could be the month. Has anyone had this problem before?