Is my problem b12?

You need to go and get a physical copy of your blood tests, that way you will know exactly what your gp calls normal and what range the results are.

the fact you have had b12 in the past means you have obviously had a problem and drs are supposed to investigate the reason why and also give injections all be it quarterly from diagnosis onwards. Once you have had any b12 injections there remains quite a lot within the system which is where the normal/high result comes from but unfortunately for many people just because it is high it doesnt necessarily mean that your body is actually using it, if this is the case your gp should be refering you to find out why.

lots of people have loads of problems getting what they believe the correct treatment for b12d and have to resort to self medicating be that by sub lingual lozenges, drops, nasal spray, patches or injecting.

you could look at b12d org and pernicious anemea sites both of which have much useful information and help.

There is every chance you have got low B12 as you are vegetarian. Most B12 in our food comes from meat, fish, etc....if you aren't eating these foods then your levels will be low. Why have the doctors only been giving you injections at irregular intervals? Once you are on injections any blood testing is considered unnecessary. Of course levels will be high on injections. Has the doctor suggested any alternative supplements of B12 in your case. I wonder if tablets might work, or sublingual sprays or lozenges?

Some of us have issues within the digestive system, where the body can't absorb B12 in the gut. We have to have injections because tablets would not be absorbed as they rely on the digestive process.

Ask for a copy of your last blood test, so you can actually see what the "normal" level was. Anything under 200 should be treated in the UK, and in many other countries 500 is the cut off point.

The Pernicious Anaemia Society website can be helpful for more detailed information.

For the past few months I have had monthly b-12 injections. My reason is perhaps different than yours. I have a new Doctor that I have been seeing for almost a year now. Back in July my complete blood test revealed a very high level of red blood cells. I had the same symptoms as you. After a multitude of tests right down to two bone marrow aspirations I finally got a diagnosis. Secondary Polycythemia. It's a red blood cell disorder. My course of treatment is b-12 injections that help produce heathy red blood cells. My body was not absorbing it so therefore the injections. I feel so much better. No more dizzy feelings, no more foggy periods where I can't think fast enough and a lot more energy. Hope you get to the bottom of this! 

Yes the dizzy periods came out of nowhere. They did not last long but In my case it would last for about an hr. I would reach for my bottled water and drink as much as I could. I was horrified when it happened. I was ok when it happened at home. It was when I was out. Then came the panick. I hope you get to the bottom of this nightmare. Finally I did.