What do you think my chances are?

Im trying to stay positive. My temp went down again this morning but Im not sure If I want to trust it. I went to bed at midnight and back up at 4 for work. I usually take my temps every morning at 550 am. I was excited the way my chart was looking.. now not so much. Ive had cramping on my left side for two days now my breasts do not hurt. Should I just accept that this cycle was a fail and wait for af? Af is due the 30th.