Lost AF.

I always get my period on the 16th(+\- a day depending on days in the month) Last period was November 16th. I had pinkish spotting when I wiped on the evening of the 12th to the morning of the 14th. Never used a pad or liner during that time since it was only when I wiped. Dec16th came and still nothing. BFN on December 18th through the 31st. Yes, I went overboard testing everyday but I was concerned. The pinkish spotting when wiping returned 24th and the 28th. I decided to stop doing daily hpt for awhile for my own sanity but my mind is going crazy. What would cause a missed period and the pink CM? I’ve been super tired and extremely nauseous. Any ideas ladies?