Been on generic lexapro for a little over 6 weeks 10 mgs for 2 weeks 15 mgs for 2 weeks and 20 mgs for 2 weeks no help with my depression or anxiety..abilify 2mgs was added 9 days ago with no help yet..should I have stayed at a lower dose of lexapro for longer or if its going to help would it be helping at the higher dose?