Hello Henk @tys, Welcome to Mayo Clinic Connect. You may be interested in a post I shared in another discussion here on Connect -- B-6 vitamin danger: https://connect.mayoclinic.org/discussion/b-6-vitamin-danger/ where I posted the following information:

Livestrong.com – How to Lower B6
— https://www.livestrong.com/article/522968-how-to-lower-b6/

Detox From Dangerous Supplements and B6 Toxicity
— http://www.drorestesg.com/blog/detox-from-dangerous-supplements-and-b6-toxicity-

Linus Pauling Institute » Micronutrient Information Center B6
— Food sources of B6: https://lpi.oregonstate.edu/mic/vitamins/vitamin-B6#food-sources
— Fact Sheet for Consumers: https://ods.od.nih.gov/factsheets/VitaminB6-Consumer/

I have no medical training or background but think it probably didn't happen overnight so it will take awhile for the B6 levels to return to normal. Here is another good site for an explanation:

B6 section it explains -- too much or too little gives neuropathy
-- https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4199287/

You mentioned it's only been 2 months since you stopped taking the supplement. Are you taking another other supplement like a daily vitamin?