Hi Nancy,
First, welcome to the club! Yep, it sounds like you're going thru peri-meno! Many of us here have had or still have anxiety as well as the symptoms you described.
I went through the dizziness, light headedness, extreme fatigue, and lots of other bad symptoms last year, which all came on suddenly. I am one of the lucky ones - it lasted only 5 months for me - and I was 50 yo. I was put on Paxil CR which helped my anxiety. As for vitamins and such, I take everything that is recommended in the "Before the Change" book by Ann Louise Gittleman (except Progesterone cream). To date, I have had only 1 period in a 11-month period so I'm heading into meno - maybe that is why my peri-meno symptoms came/went so suddenly. The ladies on this board can probably give you better help and advice than some drs. so spend time reading the old threads that have been posted. In my case, I didn't even feel good enough to sit in front of a computer or read a book so I spent a lot of time going from dr. to dr., which made a nervous wreck out of me and none of them understood what I was going thru.
Hope this somehow helps...hope to see you posting some more.
Molly