How can I tell if I'm bipolar I've been taking Lexapro (escitalopram) ifeel very happy but than I feel down and mean?

Assessment. Rather than trying to diagnose yourself, encourage you to tell all these symptoms to your medical provider, if you have not had a comprehensive psychological evaluation by a psychiatrist or a clinical psychologist - would recommend this. This will help to clarify your diagnosis -but the diagnosis may take more than a session to determine.