>>Well my blood test says I have high B12 levels.
How's your folate?! Eat high folate foods or try active folate supp. like metafolin, not folic acid, avoid it.
>>It also reveals that I have low Vitamin D but I've been taking Vitamin D regularly and noticed a slight improvement but not much as of yet.
Your body could be utilizing Vitamin D and it shows low readings. Malabsorption is another issue. Try to get more sun on more skin for longer periods of time lately?
>>I do have digestion problems....food comes back up in my throat, have have acid reflux and heartburn regularly.
Is it certain foods that cause problems or all foods?! Stomach acid goin' back up esophagus could be fermentation + pressure, try HCl supplements temporarily to increase acidity, avoid contact with teeth.
>>What is UID?
I meant IUD, intra-uterine device (birth control). It causes many problems for women.
>>Didn't start gradually....comes and goes normally but it came again about 2months ago and didn't leave yet.
It finally came and didn't go like before. It was building up to that point, whatever condition you have. Mirena (IUD) related most likely.
What do you normally eat!? Give me a picture of a typically diet?!