crying and don't know why feel like i'm very raw

i  suffer  from  depression  for  a  good  20  yrs.  but,  now  i  have  panic   disorder . and it usually  starts  out  with  crying & gets increasing  worse . i'm  so  scared  now fearing what  lies ahead .it  gets  really  bad . i'm  taking  cymbalta  60mg. and for the first 3 months it really  helped me then  it  just  stopped  working . i can't  stop  crying & i don't  know  what  i'm  crying  about . that  shows the med isn't  working i take ativan for  my  panic  attacks . but, i'm still  getting  attacks just not as  bad  as  i  know  they can get . the dr. gave me prozac 20 mg. so i'll  be  weening off  cymbalta . i'm  nervous now & one  of  the  side  affects of  prozac  is  nervousness . but, i figure i have to atleast  try  it  right?  very  confused  silverfox46