For quite a while I have been light headed-more so when I have a virus...some days I don't trust myself driving..had all bloods back ok but have been experiencing high blood pressure...my B12 was lowish at 407-folate 18.2.
It really is driving me crazy as when in a social situation it can morph into a panic attack..has anyone else had this type of thing-please let me know if you have.
What was your TSH?
Sorry for the delay-my TSH result came in this morning=1.1
OK, so that doesn't scream any sort of anomale. I don't suppose you've had your Frees tested? Your B12 isn't that low, although of course, it could be higher. Are you supplementing B12? Those are the usual suspects.
How about your electrolytes, as Lynn-2 suggested - sodium, potassium? Doctors usually check those as a matter of course. Do you have any numbers for those?
How about vit D and ferritin?
I'm supplementing Vit D3-10,000 iu daily-also magnesium but only a basic oxide-getting a b12 supplement soon 500mg to up my levels-don't know about potassium/sodium but have been getting leg muscle cramps so will add a bit more sea salt to food also just borderline stage 1 hypertension-but only just with average readings 141/88 my target was 140/90.....I take iron supplements....no ferritin taken at last blood check.
My light headedness has improved since last post-perhaps anxiety played a part, but thank you for your time, I appreciate all the advise given so far.
You will not absorb magnesium oxide, so no point in taking it. You want magnesium citrate or something. Also if taking vit D3, you need to take vit K2 - MK7, to make sure the increase calcium, that taking vit D makes you absorb from food, gets into the teeth and bones, and doesn't build up in the soft tissues.
Do you mean 500 mcg B12? That won't help. You need 1000 mcg sublingual methylcobalamin (B12), plus a B complex.
If you have copies of your blood test results, I'm sure somewhere on there, you will find sodium and potassium. Salt doesn't do anything for cramp, it's magnesium you need for that - but more salt is good for your adrenals. 
Thanks again-a nutritionist I spoke to said that there was little difference between sub lingual and oral tablet forms. I'm getting the methylcobalamin so we'll see-can always take x2 daily. Will clear more room on the kitchen shelf-sometimes wonder if all the fillers-particularly mag. stearate have negative effects.
Well, I'm not impressed by that nutritionist! The difference is that sublingual goes directly into the blood. If you swallow the tablet, the B12 will be destroyed by the stomach acid.
Check your heart rate , heart palpitations and pauses.
Check breathing rate and if shallow or deep.
If you check your T3 reverse T3 Ratio it should be greater than 20, Stop the thyroid madness writes on this. You could be clinically hypothyroid intracellularly.
If this happens when you have a viral overload then prudent to look at diet, lifestyle, environment and possibly genetics to remove additional stressors and supplement accordingly after testing. The guidance of a Functional Nutritionist is helpful. Pm me if you want a contact recommendation.
Underlying stealth infections, menopause and an inability to detox efficiently can mess about with minerals and vitamins creating roadblocks. Obviously support adrenals, thyroid.
Dr Isabella Wenz Root Cause book is a good place to start and Dr Sarah Myhill Mitochondria not hypochondria along with her latest excellent PK diet book are roadmaps. Dr Ben Lynch is currently doing a course on supporting the epigenetics of 7 key Dirty Genes..
Best Wishes
Mourneadventurer
Yes, I’ve had this, it started with intense dizziness. Also my blood pressure was high and strangely my temps dropped. I was left continually lightheaded and couldn’t drive. It was impossible to turn my head or bend over without feeling I was going to fall.
I had electrolytes tested and was low in potassium and sodium. Sipping 1 teaspoon of hymalayan salt in my drinking water and also eating high potassium foods helped. I’m now having reflexology and acupuncture to balance my body. I think refelexology has worked the best.
I’m feeling much better but it’s taken 8-10 weeks. My blood pressure is back to normal albeit a little on the low side. My temps are back to around 98.2 which is normal for me. Throughout this I continued on my regular T3 dose but there were moments when I was thinking I should reduce it. In the end I realised, for me, it was other factors and not my thyroid meds.
I hope you solve this, I know how debilitating it is.
Sinusitis and feeling light headed!
Swaying and feeling sick and light headed
Hypothyroid / Peripheral Neuropathy 
Light headed, pins and needles, headaches
