Disheartened and disappointed...

Ok, so this is all very confusing to me, but this does not seem like a good sign. I've woke up to my bbt alarm today and yesterday and was a little cold (I typically run lower) and this morning my mouth was open (I was drooling on my hand). Idk if either one of those would effect things or not. I felt like everything was going so smoothly. Any ideas why it would rise like it should and then fall?