A rollercoaster is a good analogy for the first month or two of the treatment, in my opinion. From what I’ve experienced and read, it’s pretty common to have intense die-off for a few months. It takes a long time to kill everything off.
And it’ll get better and worse, better and worse, and eventually better. I would have days where I was feeling pretty good followed by days when all I could do well was sleep and stare at walls.