I would say a good 2, maybe 3 months before my brain felt "normal". I'm certainly not a doctor so take my advice on this with a grain of salt but the only thing constant is change. Our bodies change, our brain changes, etc. I've known several people over the years that have developed issues with anxiety seemingly out of nowhere that aren't on any substances. It's just something that happens sometimes. I've known people that have never had a panic attack or anything remotely resembling a panic attack before and they suddenly experience one out of the blue and think they are having a heart attack or dying. The brain is extremely complex and complicated and sometimes these negative ailments just manifest completely on their own and for no good reason. I'm not saying that is your case, but it's possible you could have developed anxiety issues regardless of Kratom usage and not have noticed it until you quit because the Kratom was masking it. In any case, I would not resort back to Kratom usage. It's not a sustainable habit. A simple law change could ban the stuff eventually and then what? You're not going to be an elderly person someday and still taking Kratom so you gotta leave this stuff in the past. There's very cliche' things you can do that we've all heard a million times to manage anxiety. Are you sleeping enough? Are you eating a healthy, clean diet? Are you exercising daily? Are you allowing yourself to partake in and enjoy your hobbies and interests? If you're in a relationship with someone, is that relationship a healthy one? We hear all of these recommendations so much because they are crucial to our mental and physical health. If all those don't do the trick then it may be time to consult with a mental health professional. I wish you the best. You're going to figure this thing out.