During 2 years i began being ovolacto vegetarian not in standard way.now i'm not.and i think i have hypoglycemia now.is this because of those 2 years?

Probably not unless: I have no idea what you mean "not in a standard way" which makes this difficult to answer. We often can't find the cause of hypoglycemia but one cause can be eating excessive amounts of sweets ; simple starches so if that was the case during those 2 years it may have contributed. For a good list of possible causes see http://www.Reactivehypoglycemia.Info/2009/05/reactive-hypoglycemia-causes/.