I had that right around when AF was due with my FET. I thought for sure I was getting my period. But I ended up getting a BFP! The crappy thing about potential early pregnancy symptoms is that they are very similar to AF/PMS symptoms. My advice is just to try to ignore it (annoying advice, I know). Good luck
Yeah, I felt the same all of last week...felt like AF was coming, but it was way too early. Hopefully that leads to a BFP for you as well. But as @FatPony said, so many symptoms could go one way or the other. Also, we become super aware of every sensation in our body, which is probably not super healthy. Good luck with your TWW!