You mention anxiety after coffee. One thing I have noticed in my own Keto journey is that I am MUCH more sensitive to substances than I used to be. Caffeine or alcohol hit me WAY harder. Just bringing it up as carbs or carb timing may not be the issue.
Dr. Axe has some really good information on Tryptophan and on side effects as well.
“…Supplementing with a combination of calming, anxiety-reducing amino acids and herbs — such as L-tryptophan, St. John’s wort and 5HTP — has been shown to help people overcome addictions by increasing serotonin and melatonin production. L-tryptophan is often given to people trying to quit smoking in order to improve the effectiveness of conventional treatment programs that teach people to control impulses and their emotional states better. (6) …” …More