type 2 refers to recurrent episodes of depression
with occasional episodes of hypomania, but no episode of mania. Depression is characterized by persistent low mood for at least two weeks, along with fatigue, loss of interest, hopelessness, poor concentration, poor sleep and poor appetite
. Hypomania and mania are episodes of feeling very cheerful, overconfident, overtalkative, energetic in spite of sleeping less etc, with hypomania being less severe than mania. If you have not had such episodes of depression and mania/hypomania, then you do not have a bipolar disorder. Vestibular neuritis
is a likely cause of your dizziness
and loss of balance.
Hope this helps you. Best wishes.