Light spotting, late for AF. But no full AF?

OK so. I am on CD 41. Ovulated on CD 25/26. I was so sure I was pregnant, as I have had sore breasts, and I have NEVER had sore breasts in my life. I have been exhausted like falling asleep on the couch at 6 pm. And I've cried watching friends on Netflix, chewed out the dental hygienist working on my teeth and been mildly nauseous lately. However, today I had some light pink spotting several times. No cramps and I always have cramps. I took a test this am and it was neg. Any idea's?