Hello and welcome to HealingWell,
I am sorry to hear of your extreme anxiety. You have come to a very supportive group that know where your coming from and what you are going through.
It sounds to me like you have been on so many meds that none of them have really had a chance to work. Please do try to ride out the side effects of the Lexapro and give it a chance. These meds may take up to 4-6 weeks for the full therapuetic effect to be felt.
Also do you use an antianxiety med at all, Xanax or Ativan? There are many available and using them short term may be an option until the Lexapro is working well.
Nanners posted great links for you. Please do read through them and I highly recommend the online CBT or the E-couch. It is free and you can work through the program from home.
Keep talking to us and know you are not alone.
I look forward to getting to know you better. :)