Hey (((((((Sarah)))))))))))
Generally you can't honestly make a good assessment if a drug works for you completely unless you've been on it about a month. But since you've been on the Effexor for 3? months (I hope that's right) ... I'd assume you'd be noticing a difference by now. I certainly did, and I've been on both Lexapro & Effexor (currently on Effexor). What dosage are you on? If it's a lower dosage, perhaps ask the doctor to up it for a while, and see if it works.
Not all drugs work for all people, especially when it comes to mind-altering ones like antidepressants.
If you don't think this drug is working for you - find another doctor, pronto! You need someone who will actually listen and work with you, not against you.