Hallucinations during extreme stress are not all that uncommon and they don't necessarily mean that you have a mental illness. The fact that you have had them since you were a kid says more about it. When you have the hallucinations do you become delusional? For example, have you ever had a conversation with one? When I was on Depakote I hallucinated pretty frequently. When I changed to Saphris, they went away. I am on Seroquel now and they have started again.

The crying sounds like depression. I cry a lot when I'm depressed. I just don't know about one episode of mania brought on by an antidepressant. One thing you might consider is a bipolar 2 diagnosis. Bipolar 2 is mostly depression punctuated by (usually) brief episodes of hypomania. Hypomania is a much more mild form of mania. In fact, a lot of people who are hypomanic can't even differentiate it from just being very happy. Maybe you should ask your doctor about that.