I am so sorry you are feeling so awful. I remember very well the sick headaches I had in the beginning. I was scared I was poisoning myself. I remember feeling hyperstimulated, then feeling like a lump in a chair. I remember black thoughts, and crying jags, and feeling very sorry for myself. I guess I'm about 75% through my detox. What I've noticed is that the scary times come farther and farther apart. I hope soon they will be so far apart I will forget they exist. I've watched Hubby go through a parallel process, with fewer and fewer down times.
There's no way to know what your timeline is. But there is a promise at the end of it. And to get there is one step at time. Best wishes!