Tassie, I'm on day 34. I was exactly in your shoes a few weeks ago. I'm a big researcher... if I get a cold, a sinus infection, anything, I read all about it and need to know exactly what is going on in my body.
I found the same information that you did (initial withdrawal lasting varying amounts of time but usually one week or less). I felt similarly concerned because by day 15 I was still not feeling any better.
For me my major symptoms (in my case, being very tired and major sleep disruption) faded around the 25 day mark.
Doesn't seem to be any rhyme or reason to it; I've only had a problem for a few years and plenty of folks with longer drinking histories were back on their feet faster than me. Even now I still have some minor things that haven't resolved yet (cannot WAIT until I stop waking up with bloodshot eyes). But everything's getting better with time.