Feeling bummed

I had such promising symptoms earlier in my luteal phase...my bbs were killing me, I was nauseated, lightheaded...now it's seems that all of my symptoms have gone away, which means my progesterone levels are low.  I woke up in the middle of the night with some cramps, so I fully expect AF to make an early appearance today or tomorrow.  Sigh...I guess it's on to month 5...