What can be cause of dizzyness, body weakness, forgetfullness, difficulty concentrating,lack of attention,higher bp. i had similar symptoms with neuropathy when i was bed bound (b12 defficiency) then all well july,august, then feeling like this again?

Need full workup: There are many diverse symptoms that you are reporting and an episode of an illness that makes you bed bound, should be under the care of a doctor. There are too many possibilities to speculate on here on the internet. A good history , physical and lab tests are probably in order to completely evaluate your present problems.

Anxiety: Anxiety can cause these varied symptoms, but before attributing them to anxiety,I recommend that physical problems such as deficiencies of vitamins,electrolyte disturbances,glandular(endocrine)disorders be ruled out after your physician takes a thorough history and performs a careful physical examination as well as orders appropriate tests. If these are unrevealing then referral for stress manage

Anxiety: I understand your concern for uncomfortable symptoms It is likely the Cause of Vitamin B12 deficiency was not investigated and treated such as Atrophic gastritis, Pernicious anemia, Crohn's disease, Celiac disease, Heavy drinking, Graves' disease or Lupus. Present symptoms seem to be due to Anxiety or Graves' disease See an Endocrinologist for Diagnosis and treatment; Psychiatrist for Therapy