symptoms

I'm 7DPO. The last two days I have been extremely tired, and it's been very hard for me to stay awake. I have also had slight cramping now for a couple of days. My boobs did hurt for a few days but don't hurt now. Last night when I went to bed I got dizzy and nauseous every time I closed my eyes. Does anyone have any thoughts on these symptoms? AF isn't due until the 25th.