What is going on?!?

Christina
I am currently on day 46 of this cycle. Normally I'm 30 days and pretty dang regular. I was a week late once but this is sixteen days now. No BfP. I had a tiny, TINY bit of spotting last night. Not even really spotting, just a slight pink smear when I wiped and now nothing again. A week after ovulation my breasts were so sore I couldn't touch them, nausea comes and goes, and I'm exhausted. But according to five tests I'm not pregnant. I just don't get it and am getting super depressed and frustrated.