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.
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.