It's another chemical, isn't it?

I've had 2 chemicals in the last 5 months and I think this might be my third. I really thought this would be different. I've been feeling incredibly nauseated for about a week, I had implantation bleeding, everything tasted metallic. Finally, Saturday, I got a faint line. Not even a VFL, no squinting required. The next day, it was darker. I remained nervous but felt super hopeful. The other two chemicals never got this dark (lines pink and even darker in person). But yesterday, the line looked maybe just a tiny bit lighter. I spent the day trying to tell myself it was the differences in tests, not lowering hcg levels.

And now today is so much lighter still. I still feel sick and the taste in my mouth is still metallic but these are my tests Saturday through this morning. And apparently the universe doesn't want me to be a mom...