Has anyone used this? Can you share your experiences? (Good or bad?)

I started yesterday, after I had been off Effexor or about 2 weeks (cold turkey) and I hadn't been too depressed really, but I took it that day, and last night I had a horrible breakdown where I was very depressed, couldn't stop crying, etc. I don't know if it's related or just a coincidence. I rarely talk to my med doctor because he's out of state and takes forever to call me back. I don't even know if I'm taking the proper dose actually because he is not communicating with me.. I'm on 100mg of the generic one, and I take it once a day.