I've got vitamin D , vitamin B12 and vitamin B9 deficinecy , all require supplementation and jabs. I've got a whole lot of absorption issues that gives me symptoms ranging from dizziness ( to the point where I'm nearly falling on my arse sometimes ) OCD like feelings that get my extremely pissed off and probably depression also if I'm honest. They thought I was cealic but ruled that out in the end. I also lost two stone in weight within a month about a year ago , had an extremely hard time regaining any weight. The physical problems that come with all this are worse but that's another story. I'm also allergic to wheat , dairy , fish and nuts. I've been undergoing tests for years , they're still not 100% sure what's going on.
I completely agree with Blackthornone in regards to diet helping both physical and mental symptoms. I eat completely gluten free , dairy free and 99% of direct sugar I avoid. I don't even eat much fruit because of the natural sugars as stupid as it sounds. I just tend to react to it.
When I first stopped eating processed and high sugar foods ( this is well over a year ago now ) I felt crappy at first but powered through and after a few weeks I felt amazingly better. Diet has helped me far more than any medication ever has.
I'm fairly certain what triggered all of my health problems was years of antibiotics for an unrelated health problem I had as a kid , they just seemed to really mess me up.
For anyone suffering with things like this personally from experience I'd recommend routine blood tests which could pick up some type of deficiency ( which can cause unbelievable symptoms if left untreated ) and of course to alter your diet if you haven't already.
I know what you mean about talking to people about things like this also Turd , it helps for sure.
I think I'm a member of about 50 health forums but they tend to be full of nutters so this thread is better.