For the three weeks thing
I remember reading a study, about 20 years ago, about the original release of SSRIs. There were a lot of psychiatrists speaking against them. It turned out that people who had seen their psych every week for therapy would go on this medication and then stop going to therapy, because the medication helped them properly.
A few psychiatrists were interviewed in the book I was reading and they said things like "patients who went round in circles with the same problems for years were able to finally move forward aftera few weeks of SSRIs".
I found that very interesting in its own right, but it does make me wonder if so many things have been added to the DSM in the following years, because psychiatrists had to classify things as illnesses in order to keep business going.
I wouldn't be alive now if I didn't have them. I certainly wouldn't have a career if I didn't have them. I took them for decades. I no longer need them, but if I have to take them again then I will.
I also wonder if long-term use has altered my neural pathways and that's why I don't need them anymore. This was actually something that my doctor told me when I went on them originally. She said that was one of the possiblities and not to assume that I would need them for life.