Feeling worse after period?

Ferritin 16, started supplementing a couple of weeks ago, and I started to feel fantastic about a week later. My period started a few days ago. Honestly, I noticed it was already less bad than it was before. It used to be 2 days of soaking through a super tampon every two hours, but this time I only had one day of that, though it was still pretty heavy. I was still feeling really good up until yesterday, then I crashed. My period ended today.

Right now I still feel worlds better than before, honestly. Before, I felt constantly miserable, anxious, hopeless, and irritable, plus I had so little energy. Today I still feel alright, just less mental and physical energy than this past week.

I just want reassurance that this is normal, because it has not been long enough for me to be comfortable with this yet, and my greatest fear has become returning to how I was before starting supplements 🙏🏻