Is this overmethylation and what to do?

So two months ago i got this 24/7 derealization which doesnt go away. I also have fatigue, neck and shoulder ache and headache and also some pressure in head. Before these symptoms started i took high dosages of creatine but have stopped taking it two months ago. Could these symptoms be overmethylation and if so how to get rid of these? I also have crohns disease and take high dose of b9 once every week