I started with vertigo in November and various other symptoms. It eased for a few months. I started taking methylfolate, methylb12 and bio care b plex about 3 days ago and I noticed when I lay down or get up my head feels a bit dizzy again and when I got up this morning I had dizziness again and my head feels heavy and dull headache. I don't know if this is just how my m.e has gone now or it has anything to do with taking the tabs. How can you tell?