It looks like all the medications in this class of ssri's will be effective with ocd and anxiety and depression. It would make sense to give this a trial since you are not having major side effects...wait for about six weeks before you consider a change. Also, do go into psychotherapy, it can help if you are with the right doctor.
All SSRIs, SNRIs, MAOIs, and Anafranil are indicated for OCD. Lexapro is a relatively new SSRI, so it has not obtained enough studies for FDA approval for OCD. FDA is a very cautious body. As it is an SSRI, further studies and time will provide plenty of evidence for FDA approval as an anti-obsessive agent.
To avoid stigma, you can obtain online Cognitive-behavioral therapy for your OCD.