As to the comment of being "treated" for anger, I didn't know anger was a mental illness. Yes, antidepressants have a common side effect of changing one's personality. There's a warning on every one of them to watch for violent thoughts and suicidal thoughts, and anger is a common side effect. I got very aggressive and angry on Paxil. It might go away, as you haven't been on the drug long enough to know if it's going to work or not, and Prozac is a more stimulating antidepressant, so you might be feeling some of that as well. If it continues, then this isn't the drug for you.
Anti-depressants have such a wide range of potential effects, and anger is definitely one of them. I recently read of a patient being treated with sertraline for anger and clonazepam for PTSD and anxiety. This combo seemed to help.
Hope this helps.