I have not taken lexapro but there is medication and therapist that work. It is frustrating going through different medications and therapist to find the right one but it is better than suffering for the rest of your life. The medication helps but its the therapy that will provide the most relief. Dealing with the underlying issue that you have had since childhood will help your OCD. Also, since OCD has become your way of coping you will have to learn a new "healthy" way to cope. OCD is a way to cope but a bad way. Not your fault because it worked but it will just make things worse. I was on multiple meds for a while when I was in heavy therapy and it did help but I agree with others to give it time. As far as weight gain...well its better than being crazy.